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## School Physics Quiz : Work & Energy

Answer the following questions based on work & energy.

 Formats Info Page Quiz Review
Multiple choice

1.

A body loses 1078 J of potential energy in falling through 55 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of
 110 kg 20 kg 2 kg 539 kg

Half-n-half Clue

2.

_______ is the capacity to do work.
 Pressure Force Energy

Half-n-half Clue

3.

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

4.

A carton is pulled along the ground for a distance of 3 m. If the average frictional force is 25 N, then the work done is
 3 J 75 J 25 J 225 J

Half-n-half Clue

5.

The maximum amount of work that can be done by a 30 kW machine in 10 seconds is
 3 J 300 J 3 kJ 300 kJ

Half-n-half Clue

6.

A machine that produces 119 J of work by using 140 J of energy has an efficiency of
 85 % 21 J 17 J 15 %

Half-n-half Clue

7.

A mass of 10 kg is raised through a vertical distance of 90 m. If the gravitational acceleration is 9.8 m s-2, then the potential energy gained by the mass is
 882 J 8820 J 98 J 900 J

Half-n-half Clue

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