A car rounds a flat bend of radius 30 m. The coefficient of friction is 0.3 (g = 9.8 m/s^2). The maximum safe speed is:

  1. 4.7 m/s
  2. 13.3 m/s
  3. 18.8 m/s
  4. 9.39 m/s
Answer

D) 9.39 m/s

Friction provides the centripetal force: mu mg = mv^2r Rightarrow v = mu g r = 9.39 m/s. SLO P-11-B-15 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise