Question

An open lift is moving upward with acceleration g/2. A ball is thrown vertically upward with velocity (u) wrt the lift. If ball comes back to lift after time (t). Then value of initial velocity (u) is { u is the velocity of ball wrt lift}
(1) 3gt/2
(2) gt/2
(3) 3gt/4
(4) gt/4

Answer 1

gt/2 may be i am not sure