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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 carton is pulled along the ground for a distance of 10 m. If the average frictional force is 65 N, then the work done is

  10 J

  650 J

  65 J

  6500 J

  Half-n-half Clue  
 

2.

A boy throws a ball vertically upwards from ground level. If the ball reaches a maximum height of 40 m and the gravitational acceleration is 9.8 m/s2, with what speed did the boy throw the ball?

  4 m/s

  20 m/s

  14 m/s

  28 m/s

  Half-n-half Clue  
 

3.

A body loses 4116 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

  69 kg

  420 kg

  588 kg

  7 kg

  Half-n-half Clue  
 

4.

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

  mass

  force

  pressure

  Half-n-half Clue  
 

5.

The energy losses from machines are mostly dissipated as sound energy.

  True

  False

 

6.

Both work and heat are measured in Joules.

  True

  False

 

7.

The SI unit of power is

  Volt

  Watt

  Joule

  Half-n-half Clue  
 


 
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