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Q.

A stone  is thrown upwards with a velocity of 50ms-1. Another stone is simultaneously thrown downwards from the same location with a velocity of 50ms-1. When the first stone is at the highest point, the velocity of the second stone is (Take g = 10 ms-2)

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a

Zero

b

50 ms-1

c

100 ms-1

d

150 ms-1

answer is C.

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Detailed Solution

t = 50g = 5010 = 5 s

v = u + at = 50 +10×5 = 100 m/s

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