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!

Shouldn't force pairs equal in magnitude cancel each other?

  1. Oct 19, 2016 #1
    1. The problem statement, all variables and given/known data
    If every action has an equivalent and opposite reaction, how is that anything ever happens ?. Shouldn't force pairs equal in magnitude cancel each other?
    2. Relevant equations


    3. The attempt at a solution
    I tried drawing a free body diagram, but it didn't help much. This is a conceptual problem for me
     
  2. jcsd
  3. Oct 19, 2016 #2
    Hi!
    Could you state Newton's Third Law?
     
  4. Oct 19, 2016 #3
    Every action has an equal and opposite reaction.
     
  5. Oct 19, 2016 #4
  6. Oct 19, 2016 #5

    cnh1995

    User Avatar
    Homework Helper

    Two forces can cancel each other only if they are acting on the same body. Is that the case with Newton's 3rd law?
     
  7. Oct 19, 2016 #6

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    On what object (or objects) are those two forces acting on?
     
  8. Oct 19, 2016 #7
    Have you drawn a free body diagram for each body separately, showing only the forces acting on each body separately?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted