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Maximum speed of a car on the bridge

  1. Oct 25, 2009 #1
    the vertical cross section of a bridge is a circular arc of radius 300 m. what is the maximum speed at which the car will not leave the surface while passing at the top of the bridge?

    i just cant seem to understand where to go with this problem
    help please!
     
  2. jcsd
  3. Oct 26, 2009 #2

    rl.bhat

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    Re: Ucm

    Hi wal33d, welcome to PF.
    When the normal reaction from the ground is greater than the weight of the car, it will leave the ground. In the curved surface, the normal reaction is due to the centripetal force.
     
  4. Oct 26, 2009 #3
    Re: Ucm

    When the car leaves the ground, the normal force is 0. The normal force is 0 when the centripetal acceleration of the car is equal to the acceleration of gravity.
     
  5. Oct 26, 2009 #4

    rl.bhat

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    Re: Ucm

    Yes.
     
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