Q.

A stone falls freely under gravity. It covers a distance h1, h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1, h2 and h3 is

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a

h1=h23=h35

b

h2=3h,h3=3h2

c

h1=h2=h3

d

h1=2h2=3h3

answer is A.

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Detailed Solution

In first 5 second: h1=252g  ..........1In second 5 second; h2=50g−252g=752g  ..........2In third 5 second: h3=2252g−50g=1252g  ..........3From (1) & (2) & (3)h1:h2:h3=1:3:5
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