Q. A body of mass $m$ collides against a wall with a velocity $\upsilon$ and rebounds with the same speed. Its change of momentum is
A) $2\ m\upsilon$
B) $m\upsilon$
C) $- m\upsilon$
D) Zero
Explanation
(a) $\mathrm{\Delta}P = p_{i} - p_{f} = mv - ( - mv) = 2\ mv$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.