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Q.

[18]

Which of the following statements about friction is correct?


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a

It does not oppose any kind of motion

b

It opposes relative motion

c

The friction force is dependent on the area of contact

d

Both 2 and 3 

answer is B.

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Detailed Solution

The correct statement is that friction opposes relative motion.
Friction is a force that resists relative motion between two objects on contact surfaces. Friction is unaffected by the area of contact. Friction is solely determined by the nature of the surfaces in contact and the body's weight.
 
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