Question

If a piece of paper placed under a pile of books is suddenly pulled , it does not disturb the pile of books . Give reasons .

Answer 1

Because it is due to the Newton's law that an object in motion will be in motion and an object at rest will be at rest until an external force is applied on the object...so, when we suddenly pull the paper under a pile of books than the books doesn't come into the motion due to the law.

Answer 2

because force applied on the piece of paper is larger than frictional force