True/False Indicate whether the statement is
true or false.


1. 
1 radian = 57.3 degrees.


2. 
Work is done on a car by a parking brake that is
keeping it from rolling down a hill.


3. 
Mechanical work is done only when a force or torque
moves an object.


4. 
A construction crane applies a 1000 lb force on a 5 ton
Ibeam, doing mechanical work?


5. 
When air keeps a bike tire inflated, the amount of work
is equal to the pressure in the tire.


6. 
Liquids and gases tend to move from areas of
lowpressure to areas of highpressure.


7. 
A sewer system is an example of a closed fluid
system.


8. 
A hydraulic jack is an example of a closed fluid
system.


9. 
When a hydraulic cylinder moves, it displaces a volume
of fluid.


10. 
In a fluid system work is done when a pressure
difference causes liquids or gas to move.


11. 
Useful work can be done in closed fluid systems to
provide mechanical work.


12. 
The basic unit of an electrical charge is the
coulomb.


13. 
6.25
1018 electrons = 1 coulomb.


14. 
Electrical work happens when a voltage doesn’t move a
charge.


15. 
Voltage differences cause a charge to move.


16. 
For an electrical device to be 100% efficient, work out
must equal work in.


17. 
Electricity is not a very efficient way to transport
energy.


18. 
In devices such as rotating motors, radios, and coffee
pots, we can’t actually see the electrical work being done. We can
only see the results of electrical work.


19. 
Deceleration is a rate increase.


20. 
Speed is a scalar quantity


21. 
The equation for linear speed is .


22. 
Average velocity and average speed are the same.


23. 
A train going down a mountain will demonstrate a change
of acceleration.


24. 
Miles per hour (mph) is the SI unit for speed.


25. 
Speed not only tells us how fast something is moving
but it also tells us in what direction the object is moving.


26. 
The speed of an object is its velocity


27. 
When a car slows to a stop sign its acceleration
changes.


28. 
is used to figure the time it takes to move a volume.


29. 
It would not be important for the manager of a city
water treatment plant to know the flow rate of water through the
system.


30. 
Locating compressed air sources (storage tanks or
compressors) near the point of use makes no difference on flow rate.


31. 
Volumeflow rate is found by dividing the volume of
fluid flowing by the time required to flow through the pipe.


32. 
Rates in fluid systems can be measured by calculating
fluid speed.

Multiple Choice Identify the choice that best
completes the statement or answers the question.


33. 
Work is equal to force applied to an object
______________ the distance the object moves in the direction of the
applied force.
a. 
plus 
b. 
minus 
c. 
multiplied by 
d. 
divided
by 


34. 
A special airport truck is used to push a heavy
airliner away from the terminal. The truck pushes with a force of
2000 lb for a distance of 150 ft. The mechanical work done by the
truck is ____________.
a. 
30,000 ft·lb 
b. 
300,000 ft/lb 
c. 
300,000 ft·lb 
d. 
30,000
ft/lb 


35. 
A ninety degree angle is equal to ____.
a. 
rad 
b. 
4p
rad 
c. 
rad 
d. 
2p
rad 


36. 
Useful work is defined is applied force _________.
a. 
mass 
b. 
distance 
c. 
weight 
d. 
density 


37. 
An SI unit for work is _________.
a. 
N·m 
b. 
ft·lb 
c. 
N 
d. 
kg 


38. 
You are using a winch to pull your boat out of
water. To calculate the work put into the winch you should use which
formula?
a. 
Work = force distance 
c. 
Work = pressure difference volume 
b. 
Work = torque angle swept 
d. 
Work = voltage current 


39. 
The SI unit for work is _______.
a. 
ft·lb 
b. 
N/m 
c. 
Joule 
d. 
lb/ft 


40. 
The formula for calculating efficiency is
____________________.


41. 
One radian is equal to ________.
a. 
360 degrees 
b. 
57.3 degrees 
c. 
2p
radians 


42. 
Torque can be calculated using
___________________.


43. 
When a force is applied to an object, the object may
______________.
a. 
move 
b. 
be deformed 
c. 
rotate 
d. 
all of
these 


44. 
Work is done on a barbell when it is
_____________.
a. 
resting on the
floor 
b. 
held steady by the lifter after it is
raised 
c. 
moving during the
lift 


45. 
When mechanical work is done on an object
_______________________.
a. 
the object remains
stationary 
c. 
the object remains at
rest 
b. 
the object must move 
d. 
the object
disappears 


46. 
GIVEN: 




 A block and tackle is used to
raise a deer weighing 250 lbs a distance of 2 feet. The hunter pulls
with a force of 100 lbs for 6 feet. Find the efficiency of the block
and tackle.
a. 
67% 
b. 
75% 
c. 
83% 
d. 
92% 


47. 
Work is being done by a football passing quarterback
_____________________________.
a. 
when the ball is on the
ground 
b. 
during the throwing motion of the
quarterback’s arm with the ball in his hand 
c. 
while the ball is sailing through the
air 


48. 
How many radians (rads) are there in a 360 degree
circle?
a. 
3.24 rads 
b. 
57.3 rads 
c. 
6.28 rads 
d. 
360
rads 


49. 
Which of the following is not a SI system of
measuring work?


50. 
Which of the following descriptions match the
definition of work?
a. 
A winch pulling a truck out of a
ditch. 
b. 
An escalator transporting people to a new
floor. 
c. 
A pitcher throwing a 90 mph fast
ball. 
d. 
All of the above are descriptions of the
work definition. 


51. 
Two students push on a car for 15 minutes to try to get
it out of the ditch they drove it into. The car is stuck so deep in
the mud that it doesn’t even budge. How much work has been done on
the car by the students?
a. 
30 joules 
c. 
none 
b. 
30 ft·lbs 
d. 
there isn’t enough information to
know 


52. 
If the output work is divided by the input work in a
mechanical system, the result is ______________.
a. 
efficiency 
b. 
work 
c. 
power 
d. 
force 


53. 
Another name for a Newtonmeter is
______________.
a. 
radian 
b. 
joule 
c. 
torque 
d. 
force 


54. 
How much work is done when a winch lifts 50 lbs a
distance of 1 foot off the floor?
a. 
500 ft/lbs 
b. 
50 ft·lbs 
c. 
torque 
d. 
100
ft·lbs 


55. 
What is the efficiency of a block and tackle that is
used to lift a 1000 lb safe one foot off the floor, by a worker applying
100 ft·lbs of force?
a. 
100% 
b. 
10% 
c. 
1000% 
d. 
1% 


56. 
When adding more pulleys to a system,
_______________________________.
a. 
the force of the weight
increases. 
c. 
the pulling force
increases. 
b. 
the force of the weight decreases. 
d. 
the pulling force
decreases. 


57. 
When a pump is used to raise water through a pressure
difference, the work done by the pump is equal to the ___________________
multiplied by the pressure difference.
a. 
fluid weight moved 
c. 
distance fluid
moves 
b. 
fluid volume moved 
d. 
weight density of
fluid 


58. 
The work done by a moving piston in a hydraulic
cylinder is equal to the pressure exerted by the piston multiplied by the
______________________.
a. 
area of the piston
face 
b. 
fluid volume displaced 
c. 
weight density of the
fluid 


59. 
The purpose of pumps in fluid systems is to
___________________________.
a. 
cause fluids to move
slowly 
b. 
increase resistance to flow 
c. 
create a pressure difference that causes
fluid to move 


60. 
A pump lifts 2 cubic meters of water through a pressure
difference of 200,000 N/m . The fluid work done by the pump is _______________.
a. 
400,000 N/m 
b. 
400,000 N·m 
c. 
100,000 N/m 
d. 
100,000
N·m 


61. 
A hydraulic cylinder displaces 0.25 ft of oil while the piston moves a distance of 1
ft. The pressure on the face of the piston is 60 lb/ft . The work done by the hydraulic cylinder
while moving the piston 1 ft is __________.
a. 
60 ft·lb 
b. 
60 ft/lb 
c. 
15 ft·lb 
d. 
240
ft·lb 


62. 
Work done by a hydraulic cylinder is ____________
work.
a. 
mechanical 
b. 
fluid 
c. 
electrical 
d. 
thermal 


63. 
An example of a closed fluid system is
__________________________.
a. 
a cities water system 
c. 
a fire truck 
b. 
an irrigation system 
d. 
the circulatory
system 


64. 
What is the fluid work done by a pump that lifts 100
ft
of water through a pressure difference of 5000 lb/ft .
a. 
500,000 N·m 
b. 
500,000 lb/ft 
c. 
500,000 ft·lb 
d. 
50,000
ft·lb 


65. 
An automobile airconditioning system is an example of
a(n) ____________________.
a. 
closed fluid system 
b. 
open fluid
system 


66. 
A hydraulic cylinder rod is displaced 1 ft by a
pressure of 100 lb/ft . What is the work done if 0.5 ft of fluid is displaced?
a. 
50 N·m 
b. 
50 ft·lb 
c. 
200 ft·lb 
d. 
100
ft·lb 


67. 
In a fluid system, work is done when
_________________________________.
a. 
we inhale and expand our
lungs 
b. 
a pressure difference causes liquids or
gases to move 
c. 
water is pumped through a control valve,
moving a piston 
d. 
all of
these 


68. 
A fluid system that retains and recirculates fluids is
called ___________________.
a. 
an open system 
b. 
a closed system 
c. 
a pneumatic
system 


69. 
In the equation for fluid system work, , the value for would be found by rearranging the equation in which of the
following ways?
a. 

b. 

c. 

d. 
none of
these 


70. 
An open fluid system moves fluids, but ____________
retain and recirculate the fluids throughout the system.


71. 
In a fluid system work is done when a _________________
causes liquids or gases to move.
a. 
temperature difference 
c. 
voltage difference 
b. 
pressure difference 
d. 
energy
difference 


72. 
What is the quantity moved in a fluid system?
a. 
weight 
b. 
distance 
c. 
volume 
d. 
density 


73. 
Which of the following is an equation for work done in
a pressure system?
a. 
volume displaced 
b. 
W = pressure difference V 
c. 
both a and b are equations for work done in
a pressure system 


74. 
Which of the following is not an example of a fluid
system?
a. 
movement of natural gas through
pipes from supplier to user 
b. 
movement of oil through pipes from wells to
refineries (Alaskan Oil Spill) 
c. 
movement of air through ducts in
airconditioning systems 
d. 
movement of the crankshaft which turns the
shaft rod 


75. 
Which of the following is a closed system?
a. 
a person using a drinking
straw 
b. 
a thermometer 
c. 
an automobile gas tank 
d. 
a human digestive track 
e. 
lake water flowing over a
dam 


76. 
Which of the following is an open fluid system?
a. 
the human circulatory
system 
b. 
an automobile cooling system 
c. 
the coolant in a refrigeration
system 
d. 
an automobile windshield washer
system 
e. 
an automobile brake
system 


77. 
Which of the following is not true?
a. 
fluids flow from low pressure to
high pressure 
b. 
fluids flow uphill only if work is
done 


78. 
What type of work does the work equation represent?
a. 
mechanical work 
b. 
electrical work 
c. 
fluid work 
d. 
thermal
work 


79. 
Work done in fluids can be calculated by using which of
the following? (Note: there may be more than on correct
answer.)


80. 
Which of the following equations correctly defines
electrical work?


81. 
In electrical work, the displacementlike quantity is
the charge that’s moved. The forcelike quantity is
__________________.
a. 
the voltage difference 
c. 
measured in joules 
b. 
the product of the current and
time 
d. 
measured in
newtons 


82. 
The coulomb is a unit of electrical charge that’s equal
to _______________.
a. 
one ampere 
c. 
60 ampereseconds 
b. 
the charge on 6.25 10 electrons 
d. 
one
amperesecond 


83. 
A 1.5volt battery delivers 6 coulombs of charge.
How much work has it done?
a. 
4 amperehours 
b. 
9 joules 
c. 
4 joules 
d. 
9
newtons/meter 


84. 
An electrical motor does 800 N·m of useful mechanical
work while it uses up 1000 joules of electrical energy. The
efficiency of this motor is ______.
a. 
100% 
b. 
125% 
c. 
80% 
d. 
none of
these 


85. 
A 12volt battery does 180 V·C of work. How much
charge has it moved?
a. 
2160 coulombs 
c. 
9.375 coulombs 
b. 
7.813 coulombs 
d. 
15 coulombs 


86. 
Current is defined as _______________________.
a. 
6.25 joules 
c. 
amount of charge moved per
second 
b. 
one amperesecond 
d. 
all of
these 


87. 
A 220V electric motor draws a current of 40 amperes for
five seconds. How many coulombs of charge are moved?
Remember, charge ( q) = current( I) time( t).
a. 
8 coulombs 
b. 
5.5 coulombs 
c. 
55 coulombs 
d. 
200
coulombs 


88. 
The unit for electrical charge is _____________.
a. 
amp 
b. 
volt 
c. 
Newton 
d. 
coulomb 


89. 
Electricity can do useful work by
_______________________.
a. 
doing mechanical work 
c. 
producing light 
b. 
producing heat 
d. 
all of
these 


90. 
An ammeter will measure _____________________.
a. 
electrical current 
b. 
charge 
c. 
voltage 
d. 
force 


91. 
The positive charge is carried by
_______________.
a. 
protons 
b. 
electrons 
c. 
neutrons 


92. 
Electrical work is equal to
_________________________.
a. 
volts force 
c. 
volts coulombs 
b. 
coulombs mass 
d. 
joules coulombs 


93. 
AC electricity is produced by a
_______________________.
a. 
alternator 
b. 
generator 
c. 
motor 


94. 
1 amp second equals _________________.
a. 
1 joule 
b. 
1 coulomb 
c. 
1 volt 
d. 
1
watt 


95. 
The unit of electrical work is the
______________.
a. 
ampere 
b. 
joule 
c. 
coulomb 
d. 
volt 


96. 
The unit for the rate of movement of electrical work is
the ___________.
a. 
ampere 
b. 
joule 
c. 
coulomb 
d. 
volt 


97. 
The forcelike quantity that moves electrical charge is
measured in ________________.
a. 
amperes 
b. 
joules 
c. 
coulombs 
d. 
volts 


98. 
The movement or flow of an electric charge is called
________________.
a. 
proton 
b. 
negative charge 
c. 
current 
d. 
shock 


99. 
An electric starter on a snow blower is active for 2.3
seconds. It draws a current of 10 amps at a voltage of 115
volts. Find: a. the total amount of charge moved ( ) b. the electrical work done
( )
a. 
23 C; 115 J 
b. 
23 C; 2645 J 
c. 
2645 C; 23 J 
d. 
115 C;
115V 


100. 
Why do we produce electricity to do work when the
process is only 60% efficient?
a. 
electricity is an efficient way
to transport energy 
b. 
electricity is clean 
c. 
electricity is convenient and easy to
use 
d. 
all of
these 


101. 
A coulomb of charge is equal to
_________________________.
a. 
6.25 10^{18} electrons 
b. 
a unit of electrical charge 
c. 
represented by q in the equation 
d. 
all of
these 


102. 
An electrical system produces 1000 Joules of work
output by using 1500 Joules of input. The system has an efficiency
percentage of _____.
a. 
150% 
c. 
500% 
b. 
66.7% 
d. 
none of these are even
close 


103. 
An electric motor ________________________.
a. 
looses some of the electrical
work as heat 
b. 
converts electrical work into mechanical
work 
c. 
would be a good example of an energy
transfer 
d. 
all of
these 


104. 
A 9volt battery delivers 200 coulombs of charge.
How much work has it done?
a. 
180 Joules 
b. 
180 Amps 
c. 
180 Newtons 
d. 
2.22
Joules 


105. 
In the formula , what does the q stand for?
a. 
voltage difference that moves
the charge 
c. 
quantity of charge
moved 
b. 
pressure difference 
d. 
amount of electrical
work 


106. 
Negative charge is carried by ____________.
a. 
neutrons 
b. 
electrons 
c. 
protons 
d. 
coulombs 


107. 
In electrical systems 1 joule of work is also equal to
________________.
a. 
1 voltcoulomb 
b. 
1 volt/coulomb 
c. 
1 coulomb/volt 
d. 
1
N/m 


108. 
The equation for electrical work is
________________.


109. 
A more efficient motor is one that works
___________________________.
a. 
faster for the same work
done 
b. 
at a higher voltage 
c. 
using fewer joules for the same work
done 
d. 
using fewer coulombs for the same work
done 


110. 
One joule is equivalent to ______________.
a. 
1 voltcoulomb 
b. 
1 radian 
c. 
1
amperehour 


111. 
What are the effects of electrical work?
a. 
cause movement 
b. 
produce heat 
c. 
produce light 
d. 
produce electromagnetic
radiation 
e. 
all of the
above 


112. 
A letter definition—or equation— for linear
speed is _______________.


113. 
A letter definition—or equation—for linear
acceleration is ______________.


114. 
A letter definition—or equation—for rotational or
angular speed is ______________.


115. 
An angular speed of 2 rpm can also be expressed as
________ rad/sec. (Hint: Remember that 1 min = 60 sec and 2p radians = 360°.)
a. 
0.105 
b. 
0.209 
c. 
0.318 
d. 
0.636 


116. 
If the rate’s direction and magnitude are given the
rate is a _________________.


117. 
Rates include all of the following except
_________________________.
a. 
heart rates 
c. 
speed of light 
b. 
radio signal frequency 
d. 
weight of an
automobile 


118. 
Rate is defined as a displacementlike quantity divided
by ____________.
a. 
distance 
b. 
time 
c. 
volume 
d. 
mass 


119. 
You traveled across the state of Nebraska, a distance
of 550 miles in 12 hours. What was your average speed?
a. 
50 miles/hr 
b. 
55 miles/hr 
c. 
45.8 miles/hr 
d. 
65
miles/hr 


120. 
Your car has been running, warming up the engine, for 7
minutes. The engine revolved 4550 times CW. Find the angular
speed and angular velocity
a. 
650 rpm; 650 rpm 
c. 
650 rpm; 650
rpm 
b. 
600 rpm; 600 rpm 
d. 
600 rpm; 600
rpm 


121. 
360 degrees is equal to _______ radians.


122. 
Speed is a __________________.
a. 
vector quantity 
b. 
scalar
quantity 


123. 
Which of the following is an angular rate?
a. 
merrygoround 
b. 
helicopter blades 
c. 
hands on a clock 
d. 
all of
these 


124. 
Which of the following equations best defines
velocity?


125. 
The English unit for velocity is _________.
a. 
m/sec 
b. 
ft/sec 
c. 
m/sec/sec 


126. 
Rotational speed can be determined by
____________________________.
a. 
dividing angular displacement by
elapsed time 
b. 
dividing elapsed time by angular
displacement 
c. 
multiplying angular displacement by elapsed
time 


127. 
Acceleration can occur in which types of motion?
a. 
linear only 
b. 
rotational only 
c. 
both linear and
rotational 


128. 
Which symbols are used in linear equations?
a. 

b. 

c. 

d. 

e. 
none of
these 


129. 
Rates are used in which systems?
a. 
mechanical 
b. 
fluid 
c. 
electrical 
d. 
heat 
e. 
all of
these 


130. 
Which of the following is not a unit for linear
motion?
a. 
m/sec 
b. 
mi/hr 
c. 
ft/sec 
d. 
rpm 


131. 
A negative linear acceleration indicates that an object
is _________________.
a. 
slowing down 
b. 
speeding up 
c. 
changing
direction 


132. 
What would the rate of speed of a man running 60 ft in
10 sec be?
a. 
600 ft/sec 
b. 
60 ft/sec 
c. 
60 ft/10 sec 
d. 
6
ft/sec 


133. 
A car moving is ________________.
a. 
linear motion 
b. 
rotational
motion 


134. 
A strobe light is used to determine
__________________.
a. 
voltage 
b. 
current 
c. 
speed 
d. 
rpm 


135. 
Which of the following are rates?
a. 

c. 
l = 2 m 
b. 
t = 3 sec 
d. 
= 30 degrees 


136. 
Which symbols are used in rotational equations?
a. 
w 
c. 
t 
b. 
a 
d. 
all of the
above 


137. 
Check all of the following that could be possible units
for speed.
a. 
mi/hr 
b. 
sec/m 
c. 
m/sec 
d. 
a and c only 
e. 
all of the
above 


138. 
A useful rate associated with a fluid system is
_______________.
a. 
volumeflow rate 
b. 
fluid speed 
c. 
massflow rate 
d. 
both a and
c 


139. 
If a leak in a faucet causes a water loss of 120
gallons in two days, what’s the volumeflow rate per hour (24 hours = 1
day)?
a. 
6.0 gal/hr 
b. 
60 gal/hr 
c. 
2.5 gal/hr 
d. 
25
gal/hr 


140. 
An automobile air conditioner pumps 5 kg of Freon gas
through the system in 3 minutes. Find the massflow rate of the
Freon per minute.
a. 
0.6 kg/min 
b. 
1.7 kg/min 
c. 
12 kg/min 
d. 
15
kg/min 


141. 
The size of pipes that deliver fluids over long
distances has a direct bearing on making the fluid available as
needed. This primarily has to do with _________________.
a. 
volumeflow rate 
c. 
neither a nor b 
b. 
fluid speed control 
d. 
both a and
b 


142. 
How fast a hydraulic cylinder operates is determined by
____________________.
a. 
piston area 
c. 
none of the above 
b. 
fluidflow rate 
d. 
both a and
b 


143. 
Which hose would have a bigger flow rate?
a. 
inch hose 
b. 
1inch
hose 


144. 
Common units for volumeflow rate are
_____________.
a. 
m^{3}/sec 
b. 
ft^{3}/sec 
c. 
gal/min 
d. 
all of
these 


145. 
A swimming pool holds 20,000 gallons of water.
Using a hose, it takes 24 hours to fill the pool at a steady rate.
What is the volumeflow rate of water from the hose in gallons pre
minute?
a. 
11.9 gal/min 
b. 
12.9 gal/min 
c. 
13.9 gal/min 
d. 
14.9
gal/min 


146. 
500 grams of nitrogen gas flows past a flow
meter. This is an example of _________________.
a. 
massflow 
b. 
volumeflow 


147. 
An air conditioning system pumps 10 lbs of Freon
through the system in 4 minutes. Find the massflow rate of the
Freon per minute.
a. 
2 kg/min 
b. 
2.4 kg/min 
c. 
1.7 lb/min 
d. 
2.5
lb/min 


148. 
A pipe with a diameter twice as large as another pipe
will have a flow rate ____________________________.
a. 
the same as the smaller
pipe 
c. 
2 times as fast as the smaller
pipe 
b. 
4 times as fast as the smaller
pipe 
d. 
the same 


149. 
Compressed air should be
________________________.
a. 
far from the source 
b. 
close to the source 
c. 
It doesn’t make any difference where it is
located 


150. 
In what does T equal?


151. 
A typical mass flow rate would be __________.
a. 
10 kg/sec 
b. 
1 m/sec 
c. 
10 km/sec 
d. 
1
ft/sec 


152. 
A typical volume flow rate would be ____________.
a. 
gal/min 
b. 
liters/sec 
c. 
both a and b 
d. 
none of
these 


153. 
How much time would it take to empty a 2liter pop
bottle if you drank at 100 mL/sec?
a. 
200 sec 
b. 
2000 sec 
c. 
20 sec 
d. 
2
sec 


154. 
Volume flow rate equals
_____________________________.
a. 
volume of fluid moved divided by
time of movement 
b. 
time of movement divided by volume of fluid
moved 
c. 
volume of fluid moved multiplied by time of
movement 


155. 
What is the rate of 10 gallons of water moving through
a pipe in 2 minutes? ( )
a. 
20 gal/min 
b. 
10 gal/min 
c. 
5 gal/min 
d. 
2
gal/min 


156. 
In the equation , what does the symbol V stand for?
a. 
mass 
b. 
weight 
c. 
voltage 
d. 
volume 
e. 
time 


157. 
The equation for mass flow rate is
____________________.


158. 
To convert 35 hours to minutes use the conversion
factor ___________.
a. 
1 h/60 min 
b. 
60 min/1 h 
c. 
3600 s/1 h 
d. 
1 h/60 s 
e. 
60 s/1
h 


159. 
Find the flow rate in minutes for 36.7 gal/h.
a. 
2202 gal/min 
b. 
820 gal/min 
c. 
18.2 gal/min 
d. 
1.224 gal/min 
e. 
0.612
gal/min 


160. 
What is 186000 written in powers of 10?


161. 
A pipe delivers water at 3 gal/min. If it takes
2.5 days to fill the pool, what volume is in the pool?
a. 
180 gal 
b. 
562 gal 
c. 
1.08 104 gal 
d. 
5.37 104 gal 
e. 
6.48 105 gal 


162. 
Which of the following is a unit used for volume flow
rate?
a. 
kg/hr 
b. 
m/s 
c. 
l/min 
d. 
lb/min 


163. 
It is best to have an air compressor with a
_______________________________.
a. 
long hose, because this
increases flow rate 
b. 
long hose, because this decreases flow
rate 
c. 
short hose, because this decreases flow
rate 
d. 
short hose, because a long hose decreases
flow rate 

Completion Complete each sentence or statement
with one of the following terms. On the answer sheet fill in the
corresponding letter from each column.
A
B
C
D
E
alloy
carbon
mass
dissolves
plastic


164. 
Mechanical work is done when force or torque causes an
object _________.


165. 
The work unit of one joule is also equal to one
_________________.


166. 
The effect of mechanical work on an object is
__________________________.


167. 
________________ is equal to output work divided by
input work.


168. 
When a torque causes a rotation through an angle, the
size of the angle can be expressed in degrees or in __________.


169. 
An angle of one radian is equal to ____ degrees.


170. 
Work done by a torque is equal to the torque applied
times ________________________.


171. 
Use footpounds and newtonmeters to fill in the blanks
of the following statement. Work is measured in __________________ in
the SI system and _________________ in the English system.


172. 
40 N·m = ____ joule


173. 
1 radian equals ____ degrees.


174. 
One revolution is equal to ____ radians.


175. 
One joule is equal to ____ Newton meters.


176. 
Efficiency is expressed as output work divided by
_________________.


177. 
The SI unit of work is ____________.


178. 
To figure mechanical work one must know the force and
__________________________.


179. 
Mechanical work is done when a force or torque
____________ an object.


180. 
The formula for work is
________________.


181. 
Work can be calculated using __________ and
___________. (Give two formulas)


182. 
The work required to lift water from a lake to a tank
above the lake is given by . To find the pressure difference ( Dp), the ___________ of the water must be known,
as well as the height ( h) of the lift.


183. 
Mechanical work is done when a box is pushed onto a
conveyor belt by the shaft of a hydraulic cylinder. Fluid work is
done when a motordriven pump pressurizes the fluid that operates the
piston connected to the shaft. This is an example of the general
idea of _________ as a unifying concept.


184. 
In a fluid system, work is done when a
__________________ causes liquid or gas to move.


185. 
A closed fluid system is designed to retain and
____________ the fluid.


186. 
A city water system is a(n) ______________
system.


187. 
Winds blow because air moves from ______ pressure
regions to ______ pressure regions.


188. 
26 N·m is equal to ____ Joules


189. 
___________ systems retain and recirculate fluids,
while __________ systems move fluids, but do not retain or recirculate
them.


190. 
The weight density of water is __________.


191. 
_______________________ causes work to be done in a
fluid system.


192. 
______________ and _______________ systems interact
with fluid system to produce useful work.


193. 
The equation for work done by a voltage is
__________.


194. 
6.25 10^{18} electrons is equal to a charge of
__________.


195. 
1 amperehour = ______ coulombs


196. 
_________ occurs when a voltage difference caused a
charge to move.


197. 
Work equals a forcelike quantity times a displacement,
for electrical work. The forcelike quantity is ____________________
and the displacement quantity is __________.


198. 
The general unifying equation for expressing rate is
______________________.


199. 
The SI units, m/sec, describe a
_________________.


200. 
The rate at which a car moves is described as 35 mi/hr
northeast. The rate is a ___________ [velocity, speed] and is a
__________ [vector, scalar] quantity. (Choose the correct
word.)


201. 
Average speed is determined by ________ the total
distance traveled by the total time of travel.


202. 
Velocities may be added together as numbers only
if two or more velocity vectors are in the [same, opposite]
direction. (Choose the correct word.)


203. 
A change of linear speed during an elapsed time is
called an _________________.


204. 
A negative sign in front of an acceleration value would
indicate that the object is _______________.


205. 
In the English system of units, ft/sec^{2}
indicates a unit for _________________.


206. 
A constant linear acceleration is a ___________
[uniform, nonuniform] speed change. (Choose the correct word.)


207. 
In rotating mechanical systems, displacement is
given as the _______________ through which the body rotates.


208. 
A 360° circle contains ____ radians.


209. 
Clockwise (cw) and counterclockwise (ccw) motions are
convenient ways to describe the direction of angular velocity of a
_______________ object.


210. 
When either a linear or angular speed is changing with
time, the difference in speed per unit time is called the
_______________________.


211. 
The displacement in rotational motion is
___________________________.


212. 
Velocity is a _________ quantity.


213. 
Speed is a _____________ quantity.


214. 
The equation to find average speed is
______________.


215. 
The formula for finding linear acceleration is
________________________.


216. 
When an object’s speed decreases it is called
____________.


217. 
_________ is expressed as a rate involving distance
traveled per unit of time.


218. 
If speed is given, along with direction, this quantity
is called ____________.


219. 
A change in speed where an object’s speed is increasing
would be called ____.


220. 
The equation for finding volumeflow rate is
__________________________.


221. 
The 2 ways of measuring how much fluid is displaced is
____________ and ______________.


222. 
A measured rate of cubic feet per minute would be an
English unit measurement for _______________.


223. 
Fluid moved is often called ____________ fluid.


224. 
The fluid mass moving past a given cross section in the
flow stream during a given time is the ____________ rate.


225. 
Instruments used to read volumeflow rate and massflow
rate such as a flowmeter are ___________________.


226. 
Reduced flow rates inside the pipes in any fluid system
is often caused by ______________.

Problem



A block and tackle is used to lift a load weighing
600 lb. The operator lifts the load a distance of 1.25 ft by pulling
on the rope with a force of 200 lb over a distance of 4 ft.


227. 
Input work = ____ ft·lb


228. 
A rusty nut moves with difficulty on an equally rusty
threaded shaft. It requires 5 lb of force continually applied a 10
inched from the center of the nut to turn the nut. How much work is
done in each revolution?


229. 
A weight lifter raises a 100 N barbell a distance of 3
m. Calculate the work done by the weight lifter.


230. 
If 500 ft·lbs of work has been done and the object was
moved 500 feet, what is the force?


231. 
If a winch has a lever am of 2 feet and produces a
torque of 6 ft·lbs, what is the applied force? (Hint: use )


232. 
How much work is done in moving 200 cubic feet of water
through a pressure difference of 5000 lb/ft ?


233. 
Water is lifted from an underground water stream into a
city water tower where the water is distributed within the city.
Using the weight of water to be 62.4 lb/ft , what work must be done in lifting 2500ft of water 120 ft from the underground stream to fill
the pipe of the tower?


234. 
A weight of 10 N displaces a piston filled with air 0.1
m. If the change of volume in the piston is 0.05 m ^{3}, what
is the pressure in the piston? (Hint: .) (The piston is 100 % efficient.)


235. 
What is the efficiency of a machine that has a work
input of 4200 J and a work output of 3800 J?


236. 
What quantity of charge (in coulombs) is moved within a
circuit if 6.7
10 ^{21} electrons are transferred from one part of the circuit to
another by a voltage applied to the circuit?


237. 
A typical heavy duty battery might be rated at 750
amphours. How many coulombs of charge can the battery
provide?


238. 
A 9volt battery delivers 12 coulombs of charge.
How much work has it done?


239. 
What is the speed of a car if it travels a distance of
350 meters in 11 seconds?


240. 
After touching down on a runway, an airplane is brought
to a stop in 15 seconds. If the acceleration of the plane was a
constant 4.5 m/s^{2}, what was the speed of the plane at
touchdown?


241. 
Find the speed of a car that covers a 120mile distance
in 2 hours. Remember to use proper labels.


242. 
A car maintains a speed of 60 miles per hour for 5
hours. How many miles will the car have traveled?


243. 
A car moves 55 meters in 10 seconds. Find the
linear speed of the car.


244. 
A car accelerates from stop to 10m/sec in 2 sec.
What’s the car’s acceleration? Use .


245. 
If it takes 6 minutes to fill a 30gal aquarium what is
the flow rate? Use .


246. 
Find the massflow rate of a liquid that has a weight
of 1800 lbs and fills in 30 sec?


247. 
If a tank has a volumeflow rate of 20 gallons per
minute and it runs for 20 minutes, how many gallons will be moved?


248. 
A tank holds 5000 gallons of water. It can be
filled in 2.5 hours. What is the volumeflow rate of water through
the pipe in gallons per minute?


249. 
At the gas station, if 10 gallons are pumped in 1.5
minutes, what is the volumeflow rate?


250. 
A pipe has a radius of 5 centimeters and is 50
centimeters long. A float takes 10 seconds to cover the
50centimeter distance. The water has a depth of 5 centimeters in
the pipe. What is the rate of flow of water in the pipe in
cm ^{3}/sec? The following formulas will be
helpful: area of a circle = volume =
