Question

Suppose a ball is thrown vertically upward then is the time taken to reach the zero velocity(while going up) is equal to time taken to come to the same position(from where it was thrown) or ground . If yes , give the reason

Answer 1

The time taken for a ball thrown vertically upwards with a velocity will take a time t to reduce to zero velocity. The same time t is required for the ball to reach back to the initial point.
This happens because here the retardation is caused by acceleration due to gravity which is a constant. The same acceleration acts when the ball comes down. So, both times are equal.