1. Not finding help here? Sign up for a free 30min 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!

Newton's Laws of Motion (Is my theory correct?)

  1. Oct 8, 2014 #1
    1. The problem statement, all variables and given/known data
    If two cars of equal mass are pushed apart by a spring mounted on cart #1 with a force of 14 N what will be the resulting acceleration of the carts.

    Mass of carts 1 and 2= 2.0Kg
    f=14N
    A?

    2. Relevant equations
    F=ma

    3. The attempt at a solution
    My theory is that the newtons will be distributed between the two carts so that each cart will receive 7N of force. Then i can apply f=ma to solve for the A so 7/2= 3.5m/s^2
     
  2. jcsd
  3. Oct 8, 2014 #2

    jedishrfu

    Staff: Mentor

    I think you've discovered the center of mass coordinate system for this problem.

    Since both carts have the same mass and the spring is pushing the, apart then you
    Insight is correct.

    Remember that acceleration is a vector so to be absolutely correct you must specify a direction too for each carts acceleration.
     
  4. Oct 9, 2014 #3
    "Pushed apart with a force of 14 N" means that each cart experiences a force of 14 N.
    If they were pushed each by 7 N, there would be no reason to add the 7 by 7 and give a value of 14. The two forces are opposite so their sum is zero and not 14.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Newton's Laws of Motion (Is my theory correct?)
Loading...