C04 Work and Energy

What’s on the Specification

P3.7

Energy:

1. Know and be able to apply: work = force × distance moved (in direction of force).
2. Understand work done as a transfer of energy.
3. Know and be able to apply: gravitational potential energy = $m g h$ where $h$ is the difference in height of the object.
4. Know and be able to apply: kinetic energy $=\frac{1}{2} m v^{2}$
5. Know and be able to apply: power $=\frac{\text { energy transfer }}{\text { time }}$
6. Know and be able to use in calculations the law of conservation of energy.
7. Understand the concepts of useful energy and wasted energy.
8. Know and be able to apply: percentage efficiency = (useful output)/(total input) $\times 100$

Learning Objectives

Understand the concepts of work and energy
Understand the concept of system
Master the work-energy principle
Understand the concept of potential energy
Know the differences of conservation of mechanical energy, conservation of energy, and work-energy principle

Suggested Time

Task	No. of Questions	Suggested Time
Examples	8	90 min
Quiz	10	20 min
Practice A	35	80 min
Practice B	35	90 min
Total	88	approx. 4-5 hrs

Practice:

P04A Work and Energy: Foundation

Practice:

P04B Work and Energy: Challenge

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