Question

D) Both B and C Two balls A another in the same vertical plane. After 1 sec from launch, ball A hits a horizontal fixed plank on completely inelastically, moves for 1 sec on the smooth surface of the plank and falls to ground at A', in a further 1 sec. Ball B hits the plank eleastically and falls to ground at 9. and B are projected horizontally with same velocity from the top of a building one A'B 5(2-1)metre, g-10ms. Then initial velocity is of magnitude. _ for B ls B) 4ms-1 D) 8ms-1 A) 3 ms-1 C) 5ms-1

Answer 1