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Q.

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

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a

1:2

b

1:1

c

2:1

d

1:9

answer is B.

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Detailed Solution

For both stones total mechanical energy remains conserved . therefore 12mv2 = 12mu2 +mgh . Hence in both cases final velocity is same .
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