posted by James .
A 1500 kg car is turning around an arc of radius 20 m at a constant speed of 30 mph without slipping. What is the friction force the ground exerts on the car?
F = m a
= 1500 v^2/20
v = 30 mi/hr *(1 hr/3600s)(1609 m/mi)
= 13.4 m/s