Question
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!!!!!
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
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
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
Aadjot Singh Sidhu
I agree in the fact that the frictional force is 0.443.
timer
this friction coefficient force is vary interesting. gya