First slide
Vertical projection from top of a tower
Question

A ball is thrown vertically upwards with a speed of 10 m/s from the top of a tower 200 m high and another is thrown vertically downwards with the same speed simultaneously. The time difference between them in reaching the ground (in s) is : (g = 10 m/s)2

Easy
Solution

Time difference =2ug=21010=2s

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