A car rounds a banked curve as in Figure 6.6. The radius
of curvature of the road is R, the banking angle is ", and
the coefficient of static friction is #s. (a) Determine the
range of speeds the car can have without slipping up or
down the road. (b) Find the minimum value for #s such
that the minimum speed is zero. (c) What is the range of
speeds possible if R ! 100 m, " ! 10.0°, and #s ! 0.100
(slippery conditions)?