1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Conservation of Momentum Problem

  1. Feb 24, 2008 #1
    1. The problem statement, all variables and given/known data
    (understood: two air hockey pucks make contact--the x-axis is the table)
    Puck A has a mass of .025 kg and is moving along the x axis with a velocity of +5.5m/s. It makes a collision with puck B, which has a mass of .05kg and is initially at rest. The collision is NOT head on. After the collision, the two pucks fly apart with the following angles.
    Find the final speed of a) puck A and b) puck B

    A:
    Ma=.025kg
    Voa=5.5m/s
    Vfa= ?

    B:
    Mb=.05 kg
    Vob = 0m/s
    Vfb= ?
    .......................A
    ...................../
    .................../ 65 deg
    -----A--->--B-------------
    ...................\ 37 deg
    .....................\
    .......................B

    2. Relevant equations
    (Ma)(Vfa) + (Mb)(Vfb) = (Ma)(Voa) + (Mb)(Vob)

    Also, this equation can be written in terms of X and Y

    X: (Ma)(Vfax) + (Mb)(Vfbx) = (Ma)(Voax) + (Mb)(Vobx)
    Y: (Ma)(Vfay) + (Mb)(Vfby) = (Ma)(Voay) + (Mb)(Voby)



    3. The attempt at a solution

    Since it is an air hockey table, friction is negligible.
    therefore, Momentum is conserved, and Fnet=0

    Initial momentum in Y = 0
    Initial momentum in x = (Ma)(Voax) + 0 = .1375 kgm/sec
     
    Last edited: Feb 24, 2008
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Conservation of Momentum Problem
Loading...