Answer:
Option A
,

Step-by-step explanation:
When the ball its thrown up, at half way of its flight it means half of its vertical height which is
.
potential energy = mgh
since it moved half way of height
P.E =

This means for the body to have gained half of its P.E, it will loose half of its kinetic energy.
Final kinetic energy(
) = E/2
kinetic energy =

let the final velocity at halfway flight be v1
= E/2
=

cross multiply we have
=

cancel m from both sides
=

take the square root of both sides,


Thus our final velocities will be E/2 and
