A flat (unbanked) curve on a highway has a radius of 215.0 m . A
car rounds the curve at a speed of 23.0 m/s .
What is the minimum coefficient of static friction that will
prevent sliding?
Suppose that the highway is icy and the coefficient of friction
between the tires and pavement is only one-third what you found in
the previous part. What should be the maximum speed of the car so
it can round the curve safely?