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A stone falls from a ballon that id desc...

A stone falls from a ballon that id descending at a uniform rate of 12m/s. The displacement of the stone from the point of release after 10 sec is

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The correct Answer is:
B
Initial kinetic enery`=1//2 mV_(0)^(2)`
If mass doubles, then we can sec from `(v_(y)-t)` curve then velocity becomes half of previous.
`:. 1/2xx2mxx(v_(0)/2)^(2)=(1//2mv_(0)^(2))/2` Hence [B]
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