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: 3 sphere collision

  1. Oct 31, 2005 #1
    I'm having trouble with this problem, can someone help:

    Spheres A (m=0.02 kg), B (m=0.03 kg), and C (m=0.05 kg), are each approaching the origin as they slide on a frictionless air table. the initial velocity of A is 1.5 m/s horizontally to the left and the x and y components of B's velocity are 0.25 m/s horizontally to the left and 0.433 m/s downward . all three spheres arrive at the origin at the same time and stick together. what must the x and y components of the initial velocity of C be if all three objects end up moving at 0.5 m/n in the +x direction after the collision?
  2. jcsd
  3. Oct 31, 2005 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    Show us your work. What is the principle or physical law that applies here?

  4. Oct 31, 2005 #3


    User Avatar
    Staff Emeritus
    Science Advisor

    Try writing the momenutm equations in the x and y directions.

    Consider the total kinetic energy before = total kinetic energy after.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook