What do you understand by the term momentum?
 

If $p$ is the momentum, $m$, the mass and $v$, the velocity of a body, write a mathematical expression relating the momentum with $m$ and $v$.

When a hockey ball is hit with a hockey stick, in which of the following cases will the impulsive force be the largest when time interval is

(a) $0.1 \mathrm{s},$

(b) $1 \mathrm{s},$

(c) $0.01 \mathrm{s}$?