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School Physics Quiz : Work & Energy


Answer the following questions based on work & energy.

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Multiple choice

Your Performance  

1.

A body loses 2352 J of potential energy in falling through 60 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  588 kg

  240 kg

  39 kg

  4 kg

  Half-n-half Clue
 

2.

Efficiency of a machine equals

  Work Output / Work Input × 100 %

  Work Output / (Work Input + Work Output) × 100 %

  Work Input / (Work Input + Work Output) × 100 %

  Work Input / Work Output × 100 %

  Half-n-half Clue
 

3.

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

  True

  False

 

4.

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

  pressure

  mass

  force

  Half-n-half Clue
 

5.

Kinetic energy of a body in motion equals the product of half its mass and the square of its _______

  velocity

  acceleration

  distance

  Half-n-half Clue
 

6.

Both work and heat are measured in Joules.

  True

  False

 

7.

A body loses 8820 J of potential energy in falling through 90 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  98 kg

  900 kg

  882 kg

  10 kg

  Half-n-half Clue
 


 
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