Q. The force-time $(F - t)$ curve of a particle executing linear motion is as shown in the figure. The momentum acquired by the particle in time interval from zero to $8\ second$ will be
A) $- 2\ N$-$s$
B) $+ 4\ N$-$s$
C) $6\ N$-$s$
D) Zero
Explanation
(d) Momentum acquired by the particle is numerically equal to area enclosed between the $F$-$t$ curve and time axis. For the given diagram area in upper half is positive and in lower half is negative (and equal to upper half ), so net area is zero. Hence the momentum acquired by the particle will be zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.