Q. When a body moves with some friction on a surface
A) It loses kinetic energy but momentum is constant
B) It loses kinetic energy but gains potential energy
C) Kinetic energy and momentum both decrease
D) Mechanical energy is conserved
Explanation
(c) Friction is a non-conservative external force to the system, it decreases momentum and kinetic energy both
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.