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Homework Help: Two Forces

  1. Sep 14, 2008 #1
    Hey guys, need a little help. Can someone point me in the right direction for this question? I just need to know where to start.

    Two forces FA and FB are applied to an object whose mass is 8.27 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 0.57 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.35 m/s2, due east.

    (a) Find the magnitude of FA
    (b) Find the magnitude of FB
  2. jcsd
  3. Sep 15, 2008 #2


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    Homework Helper

    Hi JJones_86,

    How are the forces related to acceleration?
  4. Sep 15, 2008 #3
    case one

    i-Fnet,x= FA cos(0)+FBcos(0)=ma

    0- because they are in the orginal x axis and pointed to the right

    a=0.57 m/s2

    case two

    do the same thing what i did in case one

    Fnet,x= FA cos(0)+FA cos(180)=ma,,, (a here is .35)
    180 because it is ponited to the left

    u have two equation with two unkowns
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