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ppk ppk
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Posts: 3561
9 years ago
A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 20° with a speed of 24.5 m/s. What is the minimum coefficient of static friction required for the car not to skid?
A) 0.12
B) 0.24
C) 0.36
D) 0.48
E) 0.60
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robertlingrobertling
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Posts: 3294
9 years ago
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wrote...
9 years ago
can u please show how you got the answer?
wrote...
Staff Member
9 years ago
can u please show how you got the answer?

If a curve with a radius of 84.0m is perfectly banked for a car traveling 68.8km/hr, what is the minimum coefficient of static friction for a car not to skid when traveling at 92.2km/hr?

Since friction is not required to provide the centripetal force for the car at 68.8km/h (the ideal speed)’ we can easily find the unknown banking angle. The normal force provides the centripetal acceleration; the horizontal component of the normal force is nsin\({\theta}\), so:

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BearPro,  bio_man,  wskennedy,  PregoPuncher,  Lylylulu02,  ubermierski
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wrote...
9 years ago
The answer is 0.1235 or A. Smiling Face with Open Mouth
Post Merge: 9 years ago

The answer is 0.1235 or A. Smiling Face with Open Mouth
wrote...
9 years ago
can u please show how you got the answer?

If a curve with a radius of 84.0m is perfectly banked for a car traveling 68.8km/hr, what is the minimum coefficient of static friction for a car not to skid when traveling at 92.2km/hr?

Since friction is not required to provide the centripetal force for the car at 68.8km/h (the ideal speed)' we can easily find the unknown banking angle. The normal force provides the centripetal acceleration; the horizontal component of the normal force is nsin\({\theta}\), so:

See attachment:


renegade756
wrote...
A year ago
Thank you
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A year ago
Thank you
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A year ago
thank you
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A year ago
thank you
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A month ago
Thank you
wrote...
A month ago
Thanks
Post Merge: A month ago

thank you
wrote...
A month ago
TY :)
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