Q93 / 180 · NEET 2016 (Phase 2) · Physics

A rigid ball of mass, $m$ strikes a rigid wall at $60^{o}$ and gets reflected without any loss of speed as shown in the figure below. The value of impulse imparted by the wall on the ball will be

Correct answer
A
$m V$
B
$2 m V$
C
$\frac{m V}{2}$
D
$\frac{m V}{3}$

Solution

$|\vec{J}| = |{\vec{P}}_{2} - {\vec{P}}_{1}| = 2 m V \cos θ = m V .$

Hence, the correct answer is option: 'A'.

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