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Homework Help: [Math Verification] Massless Pulley - Acceleration of blocks A & B?

  1. Jul 25, 2012 #1
    1. The problem statement, all variables and given/known data

    http://img152.imageshack.us/img152/8286/imag0103l.jpg [Broken]

    *I'm aware my free body diagram is off and that normal force should be in the left quadrant.
    2. Relevant equations

    F=m*a


    3. The attempt at a solution

    Would I be correct in saying..

    Fg of A = mg * sin (20)
    = 2kg * 9.8 * sin (20)
    =17.9N

    Fg of B= mg
    = (3 kg) (9.8 m/s^2)
    =29.4N

    Fnet = 29.4N - 17.9N = 11.5 N (tension of massless rope)
    F= m*a
    a= F/m
    a of (A) = 11.5/2 = 5.75 m/s^2
    a of (B) = 11.5/3 = 3.83 m/s^2
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
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