Question

A car of mass $500\text{kg}$ is moving on a level circular track of radius $R=20\text{m}$. If coefficient of static friction between the road and tyres of the car is $\frac{1}{2}$, then maximum speed of the car in circular motion will be

• A. $32\text{m/s}$
• B. $18\text{m/s}$
• C. $24\text{m/s}$
• D. $10\text{m/s}$

Answer 1

The correct option is D $10\text{m/s}$

Answer (1)
$V_{\text{max}}=\sqrt{\mu Rg}=\sqrt{\frac{1}{2}\times 20\times 10}$
$=10\text{m/s}$