Question

suppose your writing table desk is tilted a little . a book kept on it sliding down . show the direction of frictional force acting on it.​

Answer 1

Answer:

Since friction opposes the relative motion, the direction of frictional force acting here will be opposite to the motion of the book. Therefore the direction of frictional force will be in the upward direction

Answer 2

Answer:

Friction force acts opposite to the motion of the book.

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