Q. A body of mass $2\ kg$ is moving on the ground comes to rest after some time. The coefficient of kinetic friction between the body and the ground is 0.2. The retardation in the body is
A) $9.8\ m/s^{2}$
B) $4.73\ m/s^{2}$
C) $2.16\ m/s^{2}$
D) $1.96\ m/s^{2}$
Explanation
(d) We know that $a = \mu g = 0.2 \times 9.8 = 1.96\ m/s^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.