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Question

A man in a balloon throws a stone downwards with a speed of 5 m/s with respect to balloon. The balloon is moving upwards with a constant acceleration of 5m/s2Then velocity of the stone relative to the man after 2 second is


A

10 m/s

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B

30 m/s

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C

15 m/s

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D

35 m/s

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Solution

The correct option is D

35 m/s


Relative velocity of stone = - 5 m/s
Relative acceleration of stone
- 10 - 5 = - 15 m/s2
v = u + at = - 35 m/s

Relative velocity after t = 2 second is 35 m/s downwards


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