Question

A stationary ball weighing $0.25kg$ acquires a speed of $10m/s$ when hit by a hockey stick. The impulse imparted to the ball is :

• A. $0.25Ns$
• B. $2.5Ns$
• C. $2.0Ns$
• D. $0.5Ns$

Answer 1

The correct option is B $2.5Ns$

Since the forre is impulsive. So,

Change in momentum = Impulse

$⟹$ mass $\times$ change in velocity = impulse

$⟹$ Impulse= $m\times (v-u)$

$⟹$ Impulse = $0.25\times (10-0)$

$⟹$ Impulse = $2.5Ns$