A car travels on a flat , circular track...

A car travels on a flat , circular track of radius `200 m` at `30 ms^(-1)` and has a centripetal acceleration `= 4 .5 ms^(-2)` . (a) If the mass of the car is 1000 kg , what frictional force is required to provide the acceleration ? (b) If the coefficient of staic friction is 0.8 , what is the maximum speed at which the car can circle the track ?

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