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**A car traveling along a level road as a speed V slams on the brakes and skids to a stop. If the force of friction on the car is half the car’s weight, how far does the car slide? (Hint: Use work-energy theorem and solve for d)**

OK, so I know the following:

W=Fd

KE=1/2mv^2

Work=Change in KE

To use the work energy theorem, I need to know the KE. The find the KE, I meed to know either the mass of velocity. The problem tells me that the force of friction is 1/2 the car's weight, but that still doesn't give me any numbers to work with. This is where I'm stuck.