if a car takes a banked curve at less then the ideal speed -12 points OSColPhys2

Question

if a car takes a banked curve at less then the ideal speed -12 points OSColPhys2016 6.3.P.030. If a car takes a banke problem on icy mountain roads). d curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real (a) Calculate the ideal speed in (m/s) to take a 80 m radius curve banked at 15° m/s to) What is the minimum coeficient of friction needed for a frightened driver to take the same curve at 25.0 km/h? Additional Materials Reading 4. 0-12 points OSColPhy 2016 6.3 WA 026

Explanation / Answer

v = (rg(sin(theta)+ Mucos(theta))/(cos(theta) - Musin(theta)))^(1/2)
v = (80*9.8(sin(15)+ Mucos(15))/(cos(15) - Musin(15)))^(1/2)
Considering Mu = 0
v = (80*9.8(sin(15))/(cos(15)))^(1/2)
v = 14.5 m/s

(b)
25 km/hr = 6.94 m/s
6.944 = (80*9.8(sin(15)+ Mucos(15))/(cos(15) - Musin(15)))^(1/2)
Mu = 0.2

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