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Homework Help: Instanous Velocity

  1. Jan 21, 2007 #1
    1. The problem statement, all variables and given/known data
    When a rock is thrown straight into the air what is its accleration at the top of its flight when its instantanoues velocity is zero?

    2. Relevant equations


    3. The attempt at a solution
    Is the accelration 9.8m/s
  2. jcsd
  3. Jan 21, 2007 #2
    The acceleration is dependent on the sum of all the forces acting on the rock. What you have is 9.8 from the force of gravity. As long as there are no other forces on the rock...
  4. Jan 21, 2007 #3
    thanks alot so thats right
  5. Jan 21, 2007 #4
    yep. That is right.
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