Question

A ball is thrown vertically upward with a speed of 10m/s from the top of a tower 200m high and another is thrown vertically downward with the same speed simultaneously. The time difference between them in reaching the ground in s is?

Answer 1

The ball rises for 1 second (it started 10 m/s and loses speed at 10 m/s per second) so at 2 seconds it is back at the launch level going 10 m/s, just like the other ball but 2 seconds later