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Is acceleration constant when a disk is rolling down a ramp?

  1. Nov 30, 2011 #1
    I don't understand when acceleration is constant and when it changes. What are some examples of situations where the acceleration is constant and when it's not? Is acceleration constant when a disk is rolling down a ramp?
     
  2. jcsd
  3. Nov 30, 2011 #2

    Pythagorean

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    tell us first how acceleration is related to velocity
     
  4. Nov 30, 2011 #3
    velocity/time = acceleration
     
  5. Nov 30, 2011 #4

    Pythagorean

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    more particularly, it's the change in velocity over the change in time. So if you have a constant acceleration, you have a velocity that is changing with a constant rate.

    Now, what are the forces on the disk? Do you know Newton's second law?
     
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