A ball is projected vertically down with a velocity of 10 sqrt3 m//s from a height of 20m. On htting the ground if it loses 40% of its energy, the height to which it bounces is (g= 10 ms^(-2))

A ball is projected vertically down with a velocity of 10 sqrt3 m//s f

1.	A ball is projected vertically down with a velocity of 10 sqrt3 m//s from a height of 20m. On htting the ground if it loses 40% of its energy, the height to which it bounces is (g= 10 ms^(-2))
Answer» 20m 30m 19m 21m Answer :D