- #1
mandaa123
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Homework Statement
Police lieutenants, examining the scene of an accident involving two cars, measure the skid marks of one of the cars, which nearly came to a stop before colliding, to be 85 m long. The coefficient of kinetic friction between rubber and the pavement is about 0.70. Estimate the initial speed of that car assuming a level road.
Homework Equations
Fnet=ma
Ff=(coefficient of kinetic energy) Fn
vf = vi + at
The Attempt at a Solution
i have no idea what to do since none of the formulas work with the knowns.