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 7, "Conservation of Energy". There are questions on the conservation of mechanical energy, the conservation of energy and the work-energy theorem both with and without friction. 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 mass M on a string is released from rest at the point A. As it passes the lowest point B, the tension in the string is

impossible to determine; the answer depends on the length of the string.
Mg
2Mg
3Mg
None of these is correct

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Q2: A 2.0 kg projectile is fired with initial velocity components V_ox = 30 m/s and v_oy = 40 m/s from a point on the earth's surface. Neglect any effects due to air resistance. How much work was done in firing the projectile?

900 J
1600 J
2500 J
4900 J
9800 J

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Q3: Two boxes are connected to each other as shown. The system is released from rest and the 1.00 kg box falls through a distance of 1.00 m. The surface of the table is frictionless.

What is the kinetic energy of box B immediately before it reaches the floor?

2.45 J
4.90 J
9.80 J
29.4 J
39.2 J

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Q4: A 9.0 kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A.

What is the speed of the box just before it reaches point A?

98 m/s
21 m/s
9.9 m/s
5.7 m/s
4.4 m/s

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Q5: A 9.0 kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A.

What is the coefficient of kinetic friction of the surface from A to B?

0.11
0.26
0.33
0.47
0.52

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