Unit 3: Work, Energy, and Power
Physics 1 · Unit 3 · Paper 1

Work, Energy, and Power unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1Paper 2Paper 3
Each paper is built from this unit’s 51 terms and is the same for everyone, so a teacher can assign “Unit 3, Paper 1” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.
Suggested time 33 min 30 points0/17 attempted
1

Energy is conserved even when mechanical energy is not

2

Why carrying a box horizontally does no work

3

Work done by a spring

4

Work from a graph

5

Power in terms of velocity

6

Conservative vs nonconservative force

7

Conservation of mechanical energy

8

Work-energy theorem

9

When mechanical energy is not conserved

10

Kinetic energy is never negative

11

Work is a scalar

12

Internal (thermal) energy

Short answer 1. Define or explain: Work done by friction

3 pts

Short answer 2. Define or explain: Kinetic energy

3 pts

Short answer 3. Define or explain: Energy bar charts

3 pts

Short answer 4. Define or explain: Stable vs unstable equilibrium

3 pts

Free response

6 pts

A 2.0 kg block is released from rest at the top of a frictionless incline of height 1.8 m. At the bottom it slides onto a horizontal surface with μk = 0.25 and stops.

Using energy conservation, find the speed at the bottom of the incline.

Find the distance it travels on the rough surface before stopping.

On a labeled axis, sketch kinetic energy vs horizontal distance on the rough surface. (Use g = 10 m/s².)