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# Now, suppose that the curve is level (θ=0 ) and that the ice has melted, so...

Now, suppose that the curve is level (θ=0 ) and that the ice has melted, so that there is a coefficient of static friction μ between the road and the car's tires. What is μ min   , the minimum value of the coefficient of static friction between the tires and the road required to prevent the car from slipping? Assume that the car's speed is still 45.0 km/hour and that the radius of the curve is 43.8 m .

v =45 km/h =45x5/18 = 12.5 m/s

r =43.8m

g=9.8m/s2

v2min rg

μmin =v2 /rg = 12.5x12.5/ 43.8x9.8

μmin = 0.364

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