Question

A player caught a cricket ball of mass $150$ gram,which was moving with a velocity of $20$m/s.if the catching process is completed in 0.1 second, the force exerted by the ball on the hands:

• A. $100N$
• B. $30N$
• C. $20N$
• D. $15N$

Answer 1

Answer: (B)

$30N$

Given,

$m=150g=0.15kg$

$u=20m/s$

$v=0m/s$

$t=0.1sec$

From 1st equation of motion,

$v=u+at$

$a=\frac{v-u}{t}$

$a=\frac{0-20}{0.1}$

$a=-200m/s^2$ (retardation)

Force by the ball on the hand, $F=ma$

$F=0.15\times 200=30N$

The correct option is B.