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Question

A man in a balloon, throws a stone downwards with speed of 5 m/s with tespect ot balloon. The balloon is moving upwards with a constant acceleration of 5m/s2 . Then 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 initial velocity, u=5 m/s
Relative acceleration, a=5+10=15 m/s2
Now, v=u+at=5+15×2=35 m/s


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