Question

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

Answer 1

Answer:

When a book slides on the writing desk, a frictional force acts between the book and the surface of the desk . The direction of frictional force on the book is opposite to the direction of its motion and acts in upward direction.

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Explanation:

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