A car is traveling at 52.0 mi/h (23.25 m/s) on a horizontal highway.

(a) If the coefficient of static friction between road and tires on a rainy day is 0.098, what is the minimum distance in which the car will stop?

( in m)

(b) What is the stopping distance when the surface is dry and µs = 0.600?

(in m)

I've been working on this problem for a long time and can't seem to get anywhere without knowing the mass of the car.. which isn't given... can someone please help me?

Any help is greatly appreciated!

I know f=uN and that you can do sum of forces in x direction and then sum of forces in y direction but I can't figure out how to combine these equations to get the answer...