A ball B of mass m is lying at rest on the top surface of a smooth horizontal table 5 m high. Another moovin ball A of same mass make an elastic colision with B slides off the table and strikes the floor at a horizonatal distance of 10 m from the table. Then select the correct alternatives (s). `[g=10m//s^(2)]`
A. The velocity of the ball A befor collisionis 5 m/s
B. The kinetic energy of the ball B at the time when it strikes yhe ground is (mx100) J
C. the velocity of the ball A before collision is 10 m/s
D. The kinetic energy of the ball B at the time when it strikes the ground is (50xm) J
