Q.
A unidirectional force $F$ varying with time $t$ as shown in the figure acts on a body initially at rest for a short duration$\ 2T$. Then the velocity acquired by the body is
A) $\frac{\pi\ F_{0}\ T}{4\ m}$
B) $\frac{\pi\ F_{0}\ T}{2\ m}$
C) $\frac{\ F_{0}\ T}{4\ m}$
D) Zero
Explanation
(d) From 0 to $T\ $area is $+ ive$ and from $T\ to$ $2T$, area$\ is - ive$. So, net area is zero. Hence, there is no change in momentum.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.