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Homework Help: 2 blocks with an angled force problem

  1. Oct 31, 2011 #1
    1. The problem statement, all variables and given/known data

    block 1 of mass m1 = 2.4 kg and block 2 of mass m2 = 1.4 kg are connected by a string of negligible mass. Block 2 is pushed by force of magnitude 23 N and angle θ = 40°. The coefficient of kinetic friction between each block and the horizontal surface is 0.18. What is the tension in the string?

    2. Relevant equations

    F=ma fs=uFn

    3. The attempt at a solution

    for m1 i got 2.4*9.8*0.18= 4.2336 for its force of friction
    and the T-fs=m*a

    for m2 becuase the additional force, (m)(g)+force(sinθ)=Fn which is 28.504 N
    and times 0.18 to have 5.13 N of force of friction.

    and the force that is push block 2 in the x axis is force(cosθ) = 17.619 N

    and finally, T- fs of block 2 =mass of block 2 *a
    but by slove the system equation, my answer is still wrong, is my thinking incorrect?
  2. jcsd
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