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A Ball Rolling : What forces are involved?

  1. Feb 27, 2010 #1
    Let's say that a basketball was rolling on a road. A completely level road. A road that wasn't downhill or uphill, just straight. So, as its rolling, what forces are working against it? I'm thinking of 3. Gravity and friction. Also wind resistance. Am I correct? Would the wind resistance be an example of inertia?
     
  2. jcsd
  3. Feb 27, 2010 #2

    russ_watters

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    Staff: Mentor

    Also rolling resistance, which is energy dissipated by deformation of the ball.
     
  4. Feb 28, 2010 #3
    you must also account for normal force that exerts from the ground on the ball
     
  5. Feb 28, 2010 #4

    russ_watters

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    Staff: Mentor

    The normal force is not working against the rolling.
     
  6. Feb 28, 2010 #5
    I think it is natural to decompose this into two parts:

    1) Energy dissipated because of the overall shape deformation of the ball.

    2) Energy used to brake the microscopic contact bond between the ball and the ground.

    Torquil
     
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