- #1
runningirl
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Homework Statement
Driving in a car on a level road, you hit the brakes hard, lock up the wheels and skid to a stop. You measure the skid marks and find them to be 40 m long. Use this information to determine the speed of the car at the moment you hit the brakes. The coefficient of friction for rubber tires skidding on asphalt is 0.50.
Homework Equations
f=ma
The Attempt at a Solution
a=(9.8)(sin theta)
Ff=coefficient(Fn)
9.8(sintheta)(.5)=Ff
i honestly wasn't sure where to go with this problem