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Linear Momentum and Acceleration

  1. Jan 28, 2016 #1
    1. The problem statement, all variables and given/known data
    If acceleration is not equal to 0, then which of the following must not be able to stay constant?
    I: Speed
    II: Linear Momentum
    III: Kinetic Energy

    (Select any 1, 2, or all of the above, or all of the above)

    2. Relevant equations
    KE = (1/2)mv^2
    P = mv

    3. The attempt at a solution
    I think that it's only II... I thought that speed can stay constant (for example centripetal acceleration) and kinetic energy by the same reason can stay constant...
     
  2. jcsd
  3. Jan 28, 2016 #2

    andrewkirk

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    Your answer is correct.
     
  4. Jan 28, 2016 #3

    Simon Bridge

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    Sounds good to me... the question is checking that you realize about vector quantities.
     
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