Q. A body of mass $3kg$ is acted on by a force which varies as shown in the graph below. The momentum acquired is given by
A) Zero
B) $5\ N$-$s$
C) $30\ N$-$s$
D) $50\ N$-$s$
Explanation
(d) Momentum acquired = Area of force -time graph
$= \frac{1}{2} \times (2) \times (10) + 4 \times 10 = 10 + 40 = 50\ N$-$s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.