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Homework Help: Quick Physics Question (Urgent)

  1. Aug 27, 2007 #1
    1. The problem statement, all variables and given/known data

    It is possible for a particle to accelerate without changing its speed.

    True or False?

    2. Relevant equations

    I don't think there is any except average acceleration equation

    3. The attempt at a solution

    I am thinking False because Acceleration depends on velocity vector
  2. jcsd
  3. Aug 27, 2007 #2
    Think of uniform circular motion
  4. Aug 27, 2007 #3
    lol i am lost, wats uniform circular motion?
  5. Aug 27, 2007 #4
    An example...

    A car going around a circular track at the same velocity.
  6. Aug 27, 2007 #5
    oh i get it, so if the car goes in a circle, it accelerates but it doesn't actually increase its speed right?
  7. Aug 27, 2007 #6
    Yes that's right, because the car's direction is always at a tangent to the circle, hence it accelerates at a tangent, but due to the centripetal force, it stays in a circular motion
  8. Aug 27, 2007 #7

  9. Aug 27, 2007 #8
    No problem
  10. Aug 27, 2007 #9


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    Staff Emeritus
    Science Advisor
    Gold Member

    Just to clear up any possible misinterpretation, I believe Fonseka meant to write: A car going around a circular track at the same speed.

    It is not possible to go around a circular track at constant velocity.
  11. Aug 27, 2007 #10

    Yep, can't believe I said velocity there :O 100 push ups
  12. Aug 27, 2007 #11
    lol, it would be hilarious if a teacher did that infront of a classroom for saying the wrong thing
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