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Homework Help: Pulley based problem

  1. Sep 29, 2009 #1
    1. The problem statement, all variables and given/known data
    A winch raises a 40kg mass and a 10kg mass vertically up the side.A frictional force of 60N acting betweem the side and the 40kg mass.The angle the cable makes to the vertical is 15.
    a)Find the force the winch must ecert on the cable to slide the mass at a constant speed up the side
    b)If the mass are lowered with an acceleration 1.0m/s2, find the tension in the cable connecting the 2 mass
    c)If the mass are raised with an acceleration of 1.0m/s2, find the tension in the cable connecting the 2 mass.

    2. Relevant equations
    Equations i got :
    For mass 40kg : ma = T-Fg-Fk
    For mass 10Kg: m2 a= F40g(of 40 kg) - Fg(10kg) -T

    3. The attempt at a solution
    (For mass of 40kg)
    Fnet = T -F40g - Fk
    ma = T-Fg-Fk

    (For mass of 10kg)
    Fnet = F40g - F10g
    2 a= F40g(of 40 kg) - Fg(10kg) -T

    Adding the eqations i got from relevant equations
    a = 0.76m/s2 and T = 482N
  2. jcsd
  3. Sep 30, 2009 #2


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    What side? Is there a picture that goes with this?
  4. Oct 7, 2009 #3
    ye there is a picture but when i try to upload from paint document it exceeds the space limit and i cant upload it.
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