Q. A stone is released from a balloon moving upwards with velocity $v_{0}$ a height $h$ at $t = 0$. Which of the following graphs is best representation of velocity-time graph for the motion of stone?
A) [image:3_image132.emf]
B) [image:3_image133.emf]
C) [image:3_image134.emf]
D) [image:3_image135.emf]
Explanation
(a) According to kinematics equation,
$v = v_{0} - g\ t$
Upward direction is taken a positive and downward direction is taken as negative. Hence, $v - t$ graphs is straight line having negative slope.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.