Q. A ball of mass $150g$ starts moving with an acceleration of $20\ m/s^{2}$. When hit by a force, which acts on it for $0.1\ sec$ the impulsive force is
A) $0.5\ N$-$s$
B) $0.1\ N$-$s$
C) $0.3\ N$-$s$
D) $1.2\ N$-$s$
Explanation
(c) Impulse = Force $\times$ time = $m\ a\ t$
$= 0.15 \times 20 \times 0.1 = 0.3\ N - s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.