It is easier to pull a body than to push, because -

It is easier to pull a lawn roller than to push it because pulling

It is easier to pull a lawn roller than to push it because pulling .

It is easier to pull a lawn mower than to push it.

(A) : It is easier to pull a lawn roller than to push on the same horizontal rough surface (R ) : Pulling body decreases normal reaction

(A) : It is easier to pull a lawn roller than to push on the same horizontal rough surface (R ) : Pulling body decreases normal reaction

It is easier to push an empty box than to push the box full of books.Why?