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Motion of a body

  1. Jun 16, 2012 #1
    Can a body which has no initial velocity move just with acceleration?
     
  2. jcsd
  3. Jun 16, 2012 #2

    Doc Al

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    Staff: Mentor

    Not sure what you mean. Once it starts moving it will have both acceleration and velocity.

    You can certainly have a body with zero initial velocity begin moving under an acceleration. Drop a ball.
     
  4. Jun 16, 2012 #3

    HallsofIvy

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    Staff Emeritus
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    "Acceleration" means "change in velocity. As long as it has acceleration, even if it has no initial velocity it will immediately have non-zero velocity.
     
  5. Jun 16, 2012 #4
    A motionless freely-floating body can also spin without moving when given only angular acceleration (in zero gravity). See

    [added] Angular acceleration requires a pair of forces (a couple).
     
    Last edited by a moderator: Sep 25, 2014
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