Question

. A pile of book is lying on a table. When will the pile experience the force of friction?

Answer 1

Answer:

The force of friction when the book is on the table existed in direction but opposite to gravity. Therefore, the book doesn't sink into the table.

Answer 2

Explanation:

The force of friction when the book is on the table existed in direction but opposite to gravity. Therefore, the book doesn't sink into the table.

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