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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.

Power is the rate of doing work.

  True

  False

 

2.

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

  True

  False

 

3.

A carton is pulled along the ground for a distance of 11 m. If the average frictional force is 46 N, then the work done is

  5566 J

  46 J

  506 J

  11 J

  Half-n-half Clue
 

4.

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

  mass

  force

  pressure

  Half-n-half Clue
 

5.

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

  Law of Conservation of Energy

  Law of Conservation of Electric Charges

  Law of Conservation of Matter

  Half-n-half Clue
 

6.

A mass of 20 kg is moved vertically upwards through a distance of 2 m. If the gravitational acceleration is 9.8 m s-2, then the work done against gravity is

  40 J

  19.6 J

  196 J

  392 J

  Half-n-half Clue
 

7.

The maximum amount of work that can be done by a 90 kW machine in 9 seconds is

  10 J

  810 J

  10 kJ

  810 kJ

  Half-n-half Clue
 


 
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