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Work, Force & Energy Worksheet-4

Work, Force & Energy Worksheet-4

 

Multiple-Choice Question:

  1. Which of the following is used to reduce the friction of the striker on the surface of the carrom board?

          (A) Talcum powder  (B) Oil                          (C) Cream

 

  1. A lever in which the fulcrum is located between the load and effort is known as:

          (A) Class-3 lever        (B) Class-2 lever        (C) Class-1 lever

 

  1.  True/False

a.      The cutting edge of a knife is an example of a wedge.

b.      A force cannot change the direction of a moving object.

c.      Smooth surface such as ice produces less friction.

d.      Oil is used to reduce the frictional force between two surfaces.

e.      A lever in which the effort is located between the fulcrum and the load is known as class-3 levers.

f.       It is easier to push an object on an inclined plane rather than lifting it directly.

 

Fill in the blanks:

  1. The force that tries to stop the sliding movement of an object across a surface is known as ____.

 

Answer Key:

(11)   (A)

(12)  (C)

(13)  a. True; b. False; c. True; d. True; e. True; f. True

(14)  Frictional force/Friction