Question

You are pushing a table. When do you think that the friction force is acting between the surface and
legs of the table?
(A) When the table does not move at all
(B) When the table moves comfortably
(C) When the table moves with large effort
(D) Both A and C
(E) In all of the above cases
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Answer 1

Answer:

its D

a)when the table does not move at all

c)ehen the table moves with large effect

because friction always opposes the motion of the body.If the force exerted is greater than frictional force then the table moves.