Q.
A particle starts from rest at $t = 0$ and moves in a straight line with an acceleration as shown below. The velocity of the particle at $t = 3s\ $is
A) $2\ ms^{- 1}$
B) $4\ ms^{- 1}$
C) $6\ ms^{- 1}$
D) $8\ ms^{- 1}$
Explanation
(b) Velocity of graph $=$ Area of$\ a$-$t$ graph
$= (4 \times 1.5) - (2 \times 1) = 4m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.