Q. If a particle moves such that the displacement is proportional to the square of the velocity acquired , then its acceleration is

A) Proportional to $s^{2}$
B) Proportional to $\frac{1}{s^{2}}$
C) Proportional to $\frac{1}{s}$
D) A constant
Explanation

(d)
Since , $\ \ \ \ \ \ \ s \propto v^{2}\ \Rightarrow v = k\sqrt{s}$
Now, acceleration $\frac{dv}{dt} = k\frac{1}{2\sqrt{s}}\ \frac{ds}{dt}$
=$k\frac{1}{2\sqrt{s}} \bullet k\sqrt{s}$ $\left\lbrack \because v = \frac{ds}{dt} = k\sqrt{s} \right\rbrack$
$= \frac{k^{2}}{2} =$constant

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.