Question

Please answer the above question .
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Answer 1

Answer:

HEYA !! HERE IS YOUR ANSWER..................

Explanation:

A)  Friction tends to oppose any relative motion between objects, acting at the surfaces.

b)Friction is a contact force when two surfaces interact. ... Notice that both of these friction formulas ONLY depend on the coefficient of friction and the normal force. It does not depend the area of contact, it doesn't depend on the sliding speed.