Homework Help: Physics

Posted by Alex on Monday, May 14, 2012 at 11:10pm.

A car is moving with a velocity of 16 m/s when the brakes are applied and the wheels lock (stop spinning). The car then slides to a stop in 37 m. Find the coefficient of kinetic friction between the tires and the road.

Physics - drwls, Tuesday, May 15, 2012 at 1:24am
Initial kinetic energy equals the work done against friction.

(1/2)MVo^2 = M*g*muk*X

muk = Vo^2/(2*g*X) is the kinetic friction coefficient you are looking for. You do the numbers.
X = 37 m
Vo = 16 m/s

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