Q. A particle, initially at rest on a frictionless horizontal surface, is acted upon by a horizontal force which is constant in size and direction. A graph is plotted between the work done ($W$) on the particle, against the speed of the particle, ($v$). If there are no other horizontal forces acting on the particle the graph would look like
A)
B)
C)
D)
Explanation
(d) Work done = change in kinetic energy
$W = \frac{1}{2}mv^{2}$
$\therefore W \propto v^{2}$ graph will be parabolic in nature
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.