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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 96 m in height. The kinetic energy of the pebble equals twice its potential energy at a distance of _______ above sea level.
 48 m 24 m 72 m 32 m

Half-n-half Clue

2.

A boy throws a ball vertically upwards from ground level. If the ball reaches a maximum height of 250 m and the gravitational acceleration is 9.8 m/s2, with what speed did the boy throw the ball?
 70 m/s 50 m/s 35 m/s 10 m/s

Half-n-half Clue

3.

By definition, work is done when a _______ moves through a distance.
 mass pressure force

Half-n-half Clue

4.

When a current is supplied by a battery, _______ energy is converted to electrical energy.
 chemical nuclear mechanical

Half-n-half Clue

5.

A carton is pulled along the ground for a distance of 3 m. If the average frictional force is 65 N, then the work done is
 3 J 585 J 195 J 65 J

Half-n-half Clue

6.

A mass of 10 kg is moved vertically upwards through a distance of 7 m. If the gravitational acceleration is 9.8 m s-2, then the work done against gravity is
 70 J 98 J 68.6 J 686 J

Half-n-half Clue

7.

_______ is the capacity to do work.
 Force Pressure Energy

Half-n-half Clue

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