Question

a ball is thrown vertically downwards from a height of 20m with an initial velocity v square it collides with ground loses50 percent of its energy in collision and rebounds to the same height find initial velocity v​

Answer 1

Answer:

if initial velocity is v then v = 20ms-1

but if initial velocity is $v^{2}$ then v = $2\sqrt{5} ms^{-1}$

Explanation:

PFA