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!

Finding the force (complicated)?

  1. Oct 23, 2008 #1
    1. The problem statement, all variables and given/known data
    An object of mass m = 6.70 kg has an acceleration a = (1.17 m/s2)x + (-0.664 m/s2)y. Three forces act on this object: F1, F2, and F3. Given that F1 = (2.71 N)x and F2 = (-1.55 N)x + (2.05 N)y, find F3.
    ( N)x + ( N)y


    2. Relevant equations

    I'll be honest, i have no clue. i know F=ma but have absolutely no clue since there are 3 forces and the x's and y's
     
  2. jcsd
  3. Oct 23, 2008 #2
    you need to break up all the forces into x and y components. (including mg, normal force) find the net force x and y and use F=ma to find the missing x and y, then add these forces together, (its not just x+y) and that it!
     
  4. Oct 23, 2008 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Yes, add the forces but I see no reason to assume that "surface of the earth gravitation" should be included. The problem says specifically that there are three forces.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Finding the force (complicated)?
  1. Finding the Force (Replies: 5)

Loading...