Question

A ball is hit by a batsman at an angle of ${37}^{\circ }$ 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.

• A. $3m{s}^{-1}$
• B. $5m{s}^{-1}$
• C. $9m{s}^{-1}$
• D. $12m{s}^{-1}$

Answer 1

The correct option is B $5m{s}^{-1}$

The time of the flight is given as

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

Hence the time of flight is $1.8s$

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

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