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Weekly Overview |
Unit Description Unit 4 Energy
This unit focuses on energy transformation and conservation. Conversions among thermal, chemical, magnetic, electrical, and mechanical energy types are examined. In addition, mechanical advantage and efficiency of simple machines are investigated.
Essential Questions Can students:
1. discuss the relationship among work, power, and energy and solve problems demonstrating
these relationships?
2. explain and solve problems demonstrating energy being transformed from potential to kinetic
energy?
3. list ways individuals consume energy?
4. calculate mechanical advantage and efficiency of simple machines?
5. explain why energy is so expensive even though energy comes ultimately from the sun?
6. apply energy and work transformations to real-life situations?
7. discuss why we have energy shortages?
Resources/Materials
Physics: Principles and Problems, Glencoe, 2002
Standards/Benchmarks/GLEs: SI-H-A2; SI-H-A3; SI-H-A4; SI-H-A6; SI-H-B2; SI-PS-B3;
PS-H-A1; PS-H-F1; PS-H-F2 |
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Objectives |
Describe work, relating it to force and displacement. |
Differentiate between linear work and work at an angle. |
Describe power and relate it to work. |
Describe when the sum forces of work equals zero that an object will not move, yaw or pitch. |
Evaluate linear work, work at an angle, and power.
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Learning Activities
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Lecture notes on linear work.
Students will alternate between working on problems and work activity:
Problems 1-6, Problem Set A
#1,2,3; Question 2,4
Work Activity #1 – students use spring and weights to determine work on four trials. |
Lecture notes on work at an angle.
Students will alternate between working on problems and work activity:
Problems 7-12; Problem Set A #6
Work Activity #2 – students use spring, weights, and adjustable incline plane to determine work at an angle on four trials.
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Lecture notes on power.
Students will alternate between working on problems and power activity:
Problems 13-17; Problem Set A #4,7,8,9; Question 3
Power Activity – students will determine power after generating work, displacement, and time data for four situations. |
Mobile Project
Phase One – students in pairs will design a mobile with three levels that are placed off-center from one another. No motion in the horizontal is allowed and is accomplished by having the work on each side of the fulcrum equal. Students may use internet to research designs, but final design must be original.
Turn in preliminary design at end of period with sources.
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Open Response Test
Work and Power Test |
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Homework |
Complete Problems and Questions
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Complete Problems and Questions |
Research Mobile Projects and bring two websites to class on Thursday, 12/3. |
Study for Work and Power Test |
Finalize Mobile design and obtain materials needed to construct Mobile. |
