Q. A car of mass 1000 kg moves on a circular track of radius 20 m. If the coefficient of friction is 0.64, then the maximum velocity with which the car can move is
A) 22.4 $ms^{- 1}$
B) 5.6 $ms^{- 1}$
C) 11.2 $ms^{- 1}$
D) None of these
Explanation
(c) $v = \sqrt{\mu\ rg} = \sqrt{0.64 \times 20 \times 10} = 11.2\ ms^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.