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A car originally going 10 m/s comes to a stop after 2 s. What is the coefficient of kinetic friction?
A car originally going 10 m/s comes to a stop after 2 s. What is the coefficient of kinetic friction?
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- KevinLv 51 decade agoFavorite Answer
a = 10 / 2 = 5 m/s^2
friction force (assuming level surface, no other external forces) Ffric = f m g
decceleration force F = m a
decceleration force is the friction force, F = Ffric
m a = f m g
m cancels
a = f g
f = a/g = 5/10 = 1/2 = coefficient of kinetic friction
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