Asked by Reilly

The coefficient of static friction between a rubber tire and a wet road is 0.443.
a) On this surface, what is the maximum safe speed of a car going around a level, unbanked circular track of radius 250 meters?
b) How long would the car take to go once around the track at the maximum safe speed?
Help!!!!!

Answers

Answered by Scott
normal force is ... m g

frictional force is ... .443 m g

the frictional force equals the centripetal force
... .443 m g = m v^2 / r
... v^2 = .443 g r

solve for v

the circumference (for once around) is
... 2 π r

divide the circumference by the velocity to find the time
Answered by Aadjot Singh Sidhu
I agree in the fact that the frictional force is 0.443.
Answered by timer
this friction coefficient force is vary interesting. gya
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