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!

Combining conservation laws (momentum and energy)

  1. Apr 21, 2012 #1
    1. The problem statement, all variables and given/known data
    A 15kg block is attached to a very light horizontal spring of force constant 500 N/m and is resting on a frictionless horizontal table. It is struck by a 3kg stone travelling horizontally at 8m/s to the right, whereupon the stone rebounds at 2 m/s horizontally to the left.

    Find the maximum distance that the block will compress the spring after the collision.


    2. Relevant equations
    m1v1i + m2v2i = m1v1f + m2v2f
    ΔKE + ΔEE = 0


    3. The attempt at a solution
    Using conservation of momentum I ended up with v2 final (the 15kg block) being 2 m/s.
    Then I plugged that into 1/2mv^2 - 1/2kx^2 = 0 and solved for x.

    I got 0.346m, is this correct?
     
  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: Combining conservation laws (momentum and energy)
Loading...