Below you will find a set of 5 conceptual and numerical revision questions selected randomly from lots of questions I have put together covering the material in Chapter 6, "Work and Energy". There are questions on work and kinetic energy, the work-energy theorem, power and potential energy. When you have finished the quiz, click on the "Submit Quiz" button at the bottom and within seconds it will be automatically graded and the results returned to you!

To select a new set of questions click on the "Reload" or "Refresh" button on your browser. You may find some of the questions duplicated but that's the nature of a random selection. Try it a few times ... it's not fattening and you may learn something!

Many thanks to Mark Wood for producing the quiz-maker code.

Q1: A 6.0 kg block slides from rest at position A down a frictionless incline to position B.

The speed of the block at B is

3.1 m/s
4.4 m/s
11 m/s
1.8 m/s
20 m/s

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Q2: How much energy is dissipated in braking a 1000 kg car to a stop from an initial speed of 20 m/s?

20,000 J
200,000 J
400,000 J
800,000 J
10,000 J

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Q3: A 5 kg object undergoes a displacement s = 2i + 3j meters. During the displacement, a constant force F = 4i - 2j Newtons acts on the object. The work done by the force F on this object is

8 J
-6 J
2 J
14 J
-2 J

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Q4: Consider two engines. The larger is rated at 2 W and the smaller at 1 W. The smaller one can do a certain quantity of work in 2 h. The larger can do twice as much work in a time of

30 min
1 h
2 h
4 h
1.4 h

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Q5: A 5200 kg cable car in Hong Kong is pulled a distance of 360 m up a hill inclined at 12^o from the horizontal. The change in the potential energy of the car is

1.8 ¥ 10⁷ J
1.2 ¥ 10⁷ J
3.8 ¥ 10⁶ J
6.0 ¥ 10⁷ J
1.8 ¥ 10⁶ J

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