Q. A force of $10$ Newton acts on a body of mass $20\ kg$ for 10 seconds. Change in its momentum is
A) $5\ kg\ m/s$
B) $100\ kg\ m/s$
C) $200\ kg\ m/s$
D) $1000\ kg\ m/s$
Explanation
(b) $dp = F \times dt = 10 \times 10 = 100\ kg\ m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.