(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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.

2. Relevant equations

Fnet=ma

Ff=(coefficient of kinetic energy) Fn

vf = vi + at

3. The attempt at a solution

i have no idea what to do since none of the formulas work with the knowns.

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# Homework Help: Finding velocity (deals with coefficient of kinetic energy)

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