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Q.

A body starts falling from height 'h' and travels distance h2 during last second of motion then time of flight is (in second ):

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a

2-1

b

2+2

c

2+3

d

3+2

answer is B.

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Detailed Solution

h=12gt2and h2=12gt−12⇒t=2+2
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A body starts falling from height 'h' and travels distance h2 during last second of motion then time of flight is (in second ):