Q.

Why a force of friction is considered a contact force?

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a

Friction occurs when two objects are in contact with each other

b

Friction occurs when one body is rubbed

c

Friction occurs when two objects repel each other

d

Friction occurs when the objects move in opposite direction

answer is D.

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Detailed Solution

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A force of friction is a contact force because for frictional force to occur two objects must be in contact with each other. and friction force is always in opposite direction 

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