Q. A body of mass $5\ kg$ is moving in a circle of radius $1\ m$ with an angular velocity of $2\ radian/\sec$. The centripetal force is
A) $10\ N$
B) $20\ N$
C) $30\ N$
D) $40\ N$
Explanation
(b) Centripetal force $= mr\omega^{2} = 5 \times 1 \times (2)^{2} = 20\ N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.