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JeremyWsmith
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Homework Statement
A 1200-kg car rounds a curve of radius 70m banked at an angle of 12 degrees. If the car is traveling at 90km/h, will friction force be required? If so, how much and in which direction?
Homework Equations
mv^2/r = Fc
The Attempt at a Solution
90km/h = 25m/s
Fc = Fnx + uFny
mv^2/r = mgsin12 + u9.8cos12
25^2 = 9.8sin12 + u9.8cos12
u=.72; The coefficient of friction .72 and the force of friction will be perpendicular to the normal force.
Can someone confirm that this is the correct answer?
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