A body falls freely from rest. It covers as much distance in last second of its motion as covered in

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2.Motion in Straight Line

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A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of........$s$

A

$3$

B

$5$

C

$7$

D

$9$

Solution

(b)$\frac{1}{2}g{(3)^2} = \frac{g}{2}(2n – 1) \Rightarrow n = 5\;s$

Standard 11

Physics

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