Question

a ball strikes the floor vertically downwards with a speed and rebounds with the same speed the magnitude of change in velocity will be?

Answer 1

Hey there,

Let the velocity at instance when it

strikes the ground be v.

Then it rebound with velocity=(-v) as direction is opposite

Change in velocity=(-v)-(v)=-2v

-ve sign implies that it is in opposite

directions of velocity we've taken.

Hope it helps