Q. A body starts from rest and moves with uniform acceleration. Which of the following graphs represents it motion?
A) [image:3_image58.emf]
B) [image:3_image59.emf]
C) [image:3_image60.emf]
D) [image:3_image61.emf]
Explanation
(b) Acceleration, $a = \frac{dv}{dt}$
As $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ a = constant$
Then $\ \ \ \ \ \ \ \ \ \ \ \ \ \frac{dv}{dt} = constant\ or\ v = kt$
Hence, the correct graph is (b).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.