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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 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

  900 kg

  882 kg

  98 kg

  10 kg

  Half-n-half Clue
 

2.

A body loses 8085 J of potential energy in falling through 75 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  735 kg

  11 kg

  825 kg

  108 kg

  Half-n-half Clue
 

3.

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?

  28 m/s

  4 m/s

  14 m/s

  20 m/s

  Half-n-half Clue
 

4.

Both work and heat are measured in Joules.

  True

  False

 

5.

If an engine does 470 J of work in 5 seconds, its average power is

  465 W

  2350 W

  475 W

  94 W

  Half-n-half Clue
 

6.

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

  force

  mass

  pressure

  Half-n-half Clue
 

7.

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

  thermal

  kinetic

  sound

  potential

  Half-n-half Clue
 

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