Question

From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If v A and v B are their respective velocities on reaching the ground, then
(a) v _B > v _A
(b) v _A = v _B
(c) v _A > v _B
(d) their velocities depend on their masses.

Answer 1

(b) : Ball A projected upwards with velocity u falls back to building top with velocity u downwards. It completes its journey to ground under gravity

Ball B starts with downwards velocity u and reaches ground after traveling a vertical distance h