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A stone is dropped from a certain height which can reach the ground in 5 second. If the stone is stopped after 3 seconds of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for the remaining distance is
(a) 2 sec
(b) 3 sec
(c) 4 sec
(d) none of these
(c) h = 1/2 g(5)2, h1 = 1/2 g(3)2 h – h1 = 1/2 gt2 1/2 g(5)2 – 1/2 g(3)2 = 1/2 gt2 ? t = 4 sec.
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