Question

A car with mass (452) kg attempts to make a turn with a radius of (31.8) m at a speed of (21.5) m/s on a horizontal surface. What is the minimum value for the static coefficient of friction between the tires and the roadway necessary for the car to make the turn without sliding? Give your answer with 3 significant figures.

Answer 1

set friction force = centripetal force, solve for mu.

Answer 2

I got (mu)(4434)=(425)(21.5^2)/31.8

Would the answer be 1.39 ?? Thank you