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What is the momentum at its maximum height?

  1. Oct 26, 2008 #1
    1. The problem statement, all variables and given/known data
    What is its momentum halfway to its maximum height? Answer in units of kg m/s

    A 0.12 kg ball of dough is thrown straight up into the air with an initial speed of 11 m/s. The acceleration of gravity is 9.8 m/s^2. What is the momentum at its maximum height? Answer in units of kg/ms. Answer is 0.


    2. Relevant equations
    tried to do 0.12x11/4.9 but was wrong.


    3. The attempt at a solution
     
  2. jcsd
  3. Oct 26, 2008 #2
    Re: Momentum

    What variables would you need to know to be able to calculate the momentum of an object?

    (I think you probably already know this from your attempt, but it's always better to write out the equation you are using explicitly, then put numbers in. Doing this helps you spot what you actually need to do - which variables you already know and which you need to find out somehow.)

    Then: how would you calculate each of these variables if you were doing a question that asked for values of each of the variables individually. (You may already have values for one or more of the variables.)

    Once you've done that, you can put it back together.
     
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