Q. A car of mass m is moving on a level circular track of radius R. If μs represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by
A) √(μs mRg)
B) √(Rg/μs)
C) √(mRg/μs)
D) √(μs Rg)
Explanation
[Solution from source] Static friction supplies the centripetal force: mv²/R ≤ μs·mg, so vmax = √(μs Rg). The mass cancels, so expressions containing m cannot be right. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.