Question

A ball is allowed to fall from the top of a tower 200m height. At the same instant ,another ball is thrown vertically upword from the bottom of the tower with a velocity of 40m/s when and where the two balls meet​

Answer 1

Answer:

Let the balls meet at a height h from the ground. The dropped ball travels a height 200-h and the ball thrown vertically upward travels height h. Let t be the time at which they meet.

The height travelled by dropped ball

The height travelled by ball thrown vertically upward

Add (1) and (2)

200=40t

t = 5 sec

Substitute the value of t in equation (1) then