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Homework Help: Linear Momentum and Its Conservation

  1. Oct 9, 2011 #1
    1. The problem statement, all variables and given/known data
    A 3.00-kg particle has a velocity of (3.00i-4.00j)m/s. (a)Find its x and y components of momentum. (b) Find the magnitude and direction of its momentum.


    2. Relevant equations
    p=mv


    3. The attempt at a solution
    For part a, I found that the x and y components of momentum is (9.00i-12.00j)kg*m/s. But I am having trouble with the magnitude and direction. I was told to pythag it, but I am still not clear on what to do.

    Thank you.
     
  2. jcsd
  3. Oct 9, 2011 #2

    PeterO

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    Homework Helper

    Rather than say :"the x and y components of momentum is (9.00i-12.00j)kg*m/s."

    Can you separately say

    The x component is : ........
    The Y component is : ........
     
  4. Oct 9, 2011 #3
    Okay.
     
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