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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 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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