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A wooden block is dropped from the top of a cliff 100 m high and simultaneously a bullet of mass 10 g is fired from the foot of the cliff upwards with a velocity of 100 m/s. The bullet and wooden block will meet each other after a time:

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10 s

1 s

0.5 s

answer is C.

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Detailed Solution

u_rel = 100 - 0 - 100 m/s, a_rel = g - g = 0
so, time of meeting = $\frac{100 m}{100 m / s} = 1 s$

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