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
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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
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