Q. A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
A) $t^{1/2}$
B) $t$
C) $t^{3/2}$
D) $t^{2}$
Explanation
(b) Power delivered to body
P=F$\bullet v$
=$mav$
=$ma(0 + gt)$ (∵$u = o$)
$\ = magt$
Or $P \propto t$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.