First slide

Vertical projection from ground

Question

2 stones are thrown from 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

For both stones total mechanical energy remains conserved . therefore $\frac{1}{2} m v^{2} = \frac{1}{2} m u^{2} + m g h . H e n c e i n b o t h c a s e s f i n a l v e l o c i t y i s s a m e .$

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