Determine the safest speed (i.e. without skidding) with which a car can go around a circular track of radius 100 m which has a coefficient of friction $\mu= 0.23$ between the track and the car tyres.
Can anyone give me a clue on how to approach this question, please?
You should have a formula for the centripetal acceleration in uniform circular motion. It involves the speed and the radius. The mass of the car divides out. Look up the formula and plug in.