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!

Newtons Third Law Involving three objects

  1. Apr 13, 2015 #1
    1. The problem statement, all variables and given/known data
    Three boxes, A, B, C, are positioned next to each other on a friction-less surface, an applied force acting on box A causes all the boxes to accelerate at 1.5 m/s/s. Calculate the force exerted by box C on box B. ma= 8 kg mb=10 kg mc= 5 kg

    2. Relevant equations

    Fnet=MA
    3. The attempt at a solution
    Fa=FNet-FconB
    10.0 kg(1.5 m/s/s)-5.0kg(1.5m/s/s)=FNet

    I am unsure if I am right
     
  2. jcsd
  3. Apr 13, 2015 #2

    jedishrfu

    Staff: Mentor

    First step, try drawing a free body diagram.

    Second compute Fnet which is moving the three masses at 1.5m/s/s.
     
  4. Apr 13, 2015 #3
    Maybe you could explicitly define your terms?

    I would recommend to do a free body diagram for each of the following:
    1) the entire block a+b+c system
    2) block a by itself
    3) block b by itself
     
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: Newtons Third Law Involving three objects
  1. Third Law of Newton (Replies: 8)

  2. Newtons third law (Replies: 2)

Loading...