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## School Physics Quiz : Work & Energy

Answer the following questions based on work & energy.

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Multiple choice

1.

A pebble is dropped from the top of a cliff 72 m in height. The kinetic energy of the pebble equals twice its potential energy at a distance of _______ above sea level.
 54 m 18 m 24 m 36 m

Half-n-half Clue

2.

A mass of 9 kg is raised through a vertical distance of 20 m. If the gravitational acceleration is 9.8 m s-2, then the potential energy gained by the mass is
 88.2 J 196 J 1764 J 180 J

Half-n-half Clue

3.

'Energy can neither be created nor destroyed' is a statement of the
 Law of Conservation of Matter Law of Conservation of Electric Charges Law of Conservation of Energy

Half-n-half Clue

4.

The energy possessed by a body due to its position or configuration is called _______ energy.
 potential thermal sound kinetic

Half-n-half Clue

5.

A carton is pulled along the ground for a distance of 7 m. If the average frictional force is 97 N, then the work done is
 679 J 7 J 97 J 4753 J

Half-n-half Clue

6.

The energy acquired by a body because of its motion is called potential energy.
 True False

7.

A mass of 50 kg is moved vertically upwards through a distance of 8 m. If the gravitational acceleration is 9.8 m s-2, then the work done against gravity is
 78.4 J 400 J 490 J 3920 J

Half-n-half Clue

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