Q. The potential energy of a particle varies with distance $x$ as shown in the graph. The force acting on the particle is zero at
A) $C$
B) $B$
C) $B$ and $C$
D) $A$ and $D$
Explanation
(c) $F = \frac{- dU}{dx}$ it is clear that slope of $U - x$ curve is zero at point $B$ and $C$
$\therefore F = 0$ for point $B$ and $C$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.