Assertion : A glass ball is dropped on concrete floor can easily get broken compared, if it is dropped onwooden floor.Reason : On concrete floor, glass ball will take less time to come to rest.     [AIIMS 2019]

Force exerted by concrete floor is more as compared to wooden floor due to greater change in momentum.Since on concrete floor, glass ball will take less time to come to rest, so a glass ball dropped on concrete floor can easily get broken compared, if it is dropped on wooden floor. Hence, both Assertion and Reason are true and Reason is the correct explanation of Assertion.