Physics mechanics - centripetal force?

Posted on 1970-01-01 00:00:00 in Physics by RONEE

A car is driving along a circular track of diameter d = 0.55 km at a constant speed of v = 21 m/s. 

1)Write an expression for the magnitude of the acceleration a of the car in terms of the given parameters. 

2)What is the magnitude, in meters per second squared, of the acceleration a of the car? 

3)Write an expression for the minimum coefficient of friction μ between the car's tires and the road that is required in order to keep the car going in a circle in terms of the given parameters. 

4)What is the value of the minimum coefficient of friction μ between the car's tires and the road that is required in order to keep the car going in a circle?

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