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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.

_______ is the capacity to do work.

  Pressure

  Force

  Energy

  Half-n-half Clue
 

2.

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

  True

  False

 

3.

'Energy can neither be created nor destroyed' is a statement of the

  Law of Conservation of Electric Charges

  Law of Conservation of Energy

  Law of Conservation of Matter

  Half-n-half Clue
 

4.

A machine that produces 85 J of work by using 100 J of energy has an efficiency of

  17 J

  15 J

  15 %

  85 %

  Half-n-half Clue
 

5.

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

  pressure

  mass

  force

  Half-n-half Clue
 

6.

A body loses 1323 J of potential energy in falling through 45 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  135 kg

  29 kg

  441 kg

  3 kg

  Half-n-half Clue
 

7.

The SI unit of power is

  Watt

  Volt

  Joule

  Half-n-half Clue
 


 
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