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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 machine that produces 108 J of work by using 120 J of energy has an efficiency of

  10 %

  12 J

  90 %

  18 J

  Half-n-half Clue
 

2.

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

  force

  pressure

  mass

  Half-n-half Clue
 

3.

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

  thermal

  sound

  potential

  kinetic

  Half-n-half Clue
 

4.

The energy acquired by a body because of its motion is called potential energy.

  True

  False

 

5.

_______ is the capacity to do work.

  Energy

  Pressure

  Force

  Half-n-half Clue
 

6.

When a current is supplied by a battery, _______ energy is converted to electrical energy.

  chemical

  nuclear

  mechanical

  Half-n-half Clue
 

7.

A pebble is dropped from the top of a cliff 84 m in height. The kinetic energy of the pebble equals twice its potential energy at a distance of _______ above sea level.

  63 m

  28 m

  21 m

  42 m

  Half-n-half Clue
 

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