Question

A player caught a cricket ball of mass $150g$ moving at a rate of $20\text{m/s}$. If the catching process is completed in 0.1 s, the force of the blow exerted by the ball on the hand of the player is equal to

• A. 150 N
• B. 3 N
• C. 30 N
• D. 300 N

Answer 1

The correct option is C 30 N

This is a question based on impulse momentum theorem.
$|F.\Delta t|$ = |change in momentum|
$\Rightarrow F\times 0.1=|P_f-P_i|$
As the ball will stop after being caught,
$P_i=m{v}_i=0.15\times 20=3,P_f=0$
$\Rightarrow F\times 0.1=3$
$\Rightarrow F=30N$