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Due in 10 Minutes PART TWO (Two balls dropping from roof) True/False

  1. Feb 4, 2009 #1
    Due in 10 Minutes PART TWO !! (Two balls dropping from roof) True/False

    1. The problem statement, all variables and given/known data

    Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. Consider the balls while they are both in flight. You may ignore air resistance. Which statements are true about this situation?
    As time progresses, the difference between their accelerations increases
    Ball A will hit the ground before ball B
    Both have the same vertical acceleration
    As time progresses, the difference between their velocities increases
    As time progresses, the distance between them stays constant


    2. Relevant equations



    3. The attempt at a solution

    1. False, acceleration is constant 9.81
    2. True, it fell first
    3. True, acceleration is constant
    4. Hm. I say true? One started accelerating first so the velocity should increase faster than the other
    5. False, wouldn't it increase because the velocity on one is greater?


    Please help!
     
  2. jcsd
  3. Feb 4, 2009 #2

    cristo

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    Re: Due in 10 Minutes PART TWO !! (Two balls dropping from roof) True/False

    Again, you need to show working and not just guess the answers!
     
  4. Feb 4, 2009 #3
    Re: Due in 10 Minutes PART TWO !! (Two balls dropping from roof) True/False

    Done. Quick! Help! hehe
     
  5. Feb 4, 2009 #4
    Re: Due in 10 Minutes PART TWO !! (Two balls dropping from roof) True/False

    #4 - they have the same acceleration (you said this yourself), so why should A's velocity increase at a greater rate (i.e. have greater acceleration) if they're supposed to be the same?
     
    Last edited: Feb 4, 2009
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