Question

If two ball A and B are projected horizontally from a tower with speed Va and Vb respectively Va is greater than Vb . Then which ball reaches the ground first and why?

Answer 1

Both ball will reach the ground at same time because the are fallen from same height and under same acceleration of gravity and having zero initial velocity along y direction.

Va and Vb are along x direction so they will only help in determining range not the time of flight.