First slide

Vertical projection from top of a tower

Question

2 stones are thrown form top of tower, one vertically upward and other downward with same speed. Ratio of velocity when they hit the ground is:

Moderate

A

1 : 2
B

1 : 1
C

2 : 1
D

1 : 9

Solution

$v^{2} = u^{2} + 2 gh and for other v^{2} = {(- u)}^{2} + 2 gh$

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