Calculate the maximum acceleration (in m/s2) of a car that is heading up a 11° slope (one that makes an angle of 11° with the horizontal) under the following road conditions. Assume that only half the weight of the car is supported by the two drive wheels and 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 µs = 0.100, the same as for shoes on ice?

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