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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 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?

  35 m/s

  50 m/s

  10 m/s

  70 m/s

  Half-n-half Clue
 

2.

A body loses 3773 J of potential energy in falling through 35 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  343 kg

  385 kg

  11 kg

  108 kg

  Half-n-half Clue
 

3.

The maximum amount of work that can be done by a 90 kW machine in 6 seconds is

  15 J

  540 J

  15 kJ

  540 kJ

  Half-n-half Clue
 

4.

A pebble is dropped from the top of a cliff 72 m in height. The kinetic energy of the pebble equals twice its potential energy at a distance of _______ above sea level.

  18 m

  54 m

  36 m

  24 m

  Half-n-half Clue
 

5.

If an engine does 400 J of work in 8 seconds, its average power is

  392 W

  50 W

  408 W

  3200 W

  Half-n-half Clue
 

6.

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

  kinetic

  thermal

  potential

  sound

  Half-n-half Clue
 

7.

Both work and heat are measured in Joules.

  True

  False

 


 
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