A ball is hit by a batsman at an angle of 37^o as shown in figure. man standing at P should run at w

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3-2.Motion in Plane

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A ball is hit by a batsman at an angle of $37^o$ as shown in figure. The man standing at $P$ should run at what minimum velocity so that he catches the ball before it strikes the ground. Assume that height of man is negligible in comparison to maximum height of projectile. ........ $ms^{-1}$

A

$3 $

B

$5$

C

$9 $

D

$12 $

Solution

The time of the flight is given as

$T=\frac{2 u \sin (37)}{g}$

Hence the time of flight is $1.8$ s

$v=\frac{9}{1.8} m / \mathrm{sec}$

Hence the speed of the man is $5$ $m / s$

Standard 11

Physics

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