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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 1372 J of potential energy in falling through 20 m. If the gravitational acceleration is 9.8 m s-2, then the body has a mass of

  196 kg

  69 kg

  7 kg

  140 kg

  Half-n-half Clue
 

2.

A machine that produces 144 J of work by using 160 J of energy has an efficiency of

  18 J

  90 %

  16 J

  10 %

  Half-n-half Clue
 

3.

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

  potential

  sound

  thermal

  kinetic

  Half-n-half Clue
 

4.

Kinetic energy of a body in motion equals the product of half its mass and the square of its _______

  distance

  velocity

  acceleration

  Half-n-half Clue
 

5.

A carton is pulled along the ground for a distance of 6 m. If the average frictional force is 66 N, then the work done is

  396 J

  6 J

  2376 J

  66 J

  Half-n-half Clue
 

6.

Efficiency of a machine equals

  Work Input / (Work Input + Work Output) × 100 %

  Work Input / Work Output × 100 %

  Work Output / Work Input × 100 %

  Work Output / (Work Input + Work Output) × 100 %

  Half-n-half Clue
 

7.

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

  True

  False

 


 
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