Question

A circular race track of radius $300m$ is banked at an angle of ${15}^o.$ If the coefficient of friction between the wheels of a race-car and the road is $\mathrm{0.2.}$ Choose the correct options ($g=9.8m/s^2$)

• A. The optimum speed of the race-car to avoid wear and tear on its tires is $28.1m/s$
• B. Maximum permissible speed to avoid slipping is $38.1m/s$
• C. The optimum speed of the race-car to avoid wear and tear on its tires is $38.1m/s$
• D. Maximum permissible speed to avoid slipping is $28.1m/s$

Answer 1

Answer: (A), (B)

The correct options are
A The optimum speed of the race-car to avoid wear and tear on its tires is $28.1m/s$
B Maximum permissible speed to avoid slipping is $38.1m/s$