Calculate the maximum acceleration of a car with four wheel drive that is heading up a 8.5° slope (one that makes an angle of 8.5°with the horizontal) under the following road conditions. Assume that the static coefficient of friction is involved--that is, the tires are not allowed to slip during the acceleration.
(a) on dry concrete
(b) on wet concrete
(c) on ice, assuming that A?µs = 0.100, the same as for shoes on ice.