Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Circular Motion and max speed

  1. Jan 13, 2005 #1
    Having trouble with this question:

    "Friction provides the force needed for a car to travel around a flat, circular trace track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0m and the coefficient of friction is 0.40?"

    Any help would be great.
  2. jcsd
  3. Jan 13, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    You should have posted this in the HM section.I'm sure it will end up there.
    To apply the rules from there,what are you ideas of solving the problem??

  4. Jan 14, 2005 #3
    Start with a FBD.
  5. Jan 15, 2005 #4


    User Avatar
    Science Advisor

    What is the centripetal force necessary to keep a mass m moving around a circle of radius r at speed v?

    What is the maximum friction force on a mass m when the coefficient of friction is μ?

    Can you answer those questions? If yes, set them equal and solve for v.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook