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Jim is driving a 2268-kg pickup truck at 30.0 m/s...?

Jim is driving a 2268-kg pickup truck at 30.0 m/s and releases his foot from the accelerator pedal. The car eventually stops due to an effective friction force that the road, air, and other things exert on the car. The friction force has an average magnitude of 900 N .

I got the first two parts of the question which was

Determine the initial kinetic energy of the truck?

1.02x10^6 J

Determine the stopping distance of the truck.
1130 m

It's this part that im stuck in, i'm not exactly sure what to use to plug into the equation.

Determine the coefficient of kinetic friction between tire and surface:

I know the equation is Fk=uFk*N

But i don't have "N"

3 Answers3