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!

Homework Help: Finding Total momentum of a system

  1. Jun 13, 2012 #1
    1. The problem statement, all variables and given/known data

    A 2.2-kg cart is rolling along a frictionless, horizontal track towards a 1.0-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is +4.3 m/s, and the second cart's velocity is -1.1 m/s.*(a)*What is the total momentum of the system of the two carts at this instant?*(b)*What was the velocity of the first cart when the second cart was still at rest?

    2. Relevant equations


    3. The attempt at a solution

    So I found the momentums of each individual cart, (p1=9.5N and p2=-1.1N), do I just add the two values for the total momentum of the system? As in: 9.5N + -1.1N = 8.4 N

    Thank you
  2. jcsd
  3. Jun 14, 2012 #2
    edit: nevermind, to find the total momentum yes you just them together
    Last edited: Jun 14, 2012
  4. Jun 14, 2012 #3
    Thank you very much.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook