Q. Which of the following $v - t$ graphs represents the motion of a ball falling freely from rest under gravity and rebounding from a metallic surface?
A) [image:3_image42.emf]
B) [image:3_image43.emf]
C) [image:3_image44.emf]
D) [image:3_image45.emf]
Explanation
(c) On rebound, there is an instantaneous change in the direction of velocity. This settle the answer.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.