Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Center of Mass of a System Problem

  1. Dec 7, 2008 #1
    1. The problem statement, all variables and given/known data

    From an inertial reference frame S, the vector position of a particle of mass
    m1 = 1kg is given by r1(t)=(txhat - t^2yhat)m.
    The vector position of a particle m2=2m1 is given by r2=(t)=(txhat +t^3yhat)m

    Assume t=1second
    Find the position, the velocity and the acceleration of the center of mass of the composite system: xCM vCM a CM


    2. Relevant equations

    m1 x1(1) + m2 x2(1) / m1 + m2


    3. The attempt at a solution

    3xkg/ 3kg = 3x-direction

    velocity = x
    acceleration = 0

    I do not think this is right, could some one help?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 7, 2008 #2
    There is an x and y component to the position vector. You need to take both into consideration.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook