A ball is dropped downwards to hit the ground at time t=0. After 1 second another ball is dropped downwards from the same point. The distance between them after 3 seconds is
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a
25 m
b
20 m
c
50 m
d
9.8 m
answer is A.
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Detailed Solution
Displacement for the first body h1 = 12g32Displacement for the second body h2 = 12g22Their separation =12g9−4 = 5×5 = 25m