Question

an elastic ball droped from a certain hight bounces back due to force of reaction but when a book is droped it does not bounce back?why?​

Answer 1

Answer:

because the book is covering large surface area hence the force of reaction will be less in the case of book

Answer 2

Answer:

Because bouncing requires the object to be elastic - shortly after it deforms, its shape should return to the one it had before deforming.

Explanation:

In order for an object to bounce1, the sequence of events would be following:

object is going to touch the surface, having a kinetic energy E

the object deforms (doesn't shatter, break, explode, catch fire, etc) and its kinetic energy transforms into the internal energy.