Kinectic Energy

  1. Mar 15, 2011 #1
    1. The problem statement, all variables and given/known data
    Is it possible for an object to experience a net acceleration, yet maintain a constant kinetic
    energy?
    2. Relevant equations



    3. The attempt at a solution
    I think no because the kinetic energy equation is KE = (0.5)mv^2, because KE is not change, so v will not change; therefore, it will have acceleration equal =0.
    But i'm not sure.
     
  2. jcsd
  3. Mar 15, 2011 #2

    gneill

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    Staff: Mentor

    What type of motion has a constant acceleration yet never goes any faster?

    Hint: Think of something other than straight-line motion.
     
  4. Mar 15, 2011 #3
    circular motion?
     
  5. Mar 15, 2011 #4

    gneill

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    Staff: Mentor

    Okay. What's your argument as to why this is so?
     
  6. Mar 16, 2011 #5
    Will you consider centripetal acceleration constant. It keeps changing directions.
     
  7. Mar 16, 2011 #6

    gneill

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    Staff: Mentor

    True, but it's a constant magnitude and the kinetic energy does not change.
     
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