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Dynamic motion involving pulleys and friction.

  • Thread starter DaftCrunk
  • Start date
1. The problem statement, all variables and given/known data
http://img689.imageshack.us/img689/2315/dynamicsproblem.jpg" [Broken]

2. Relevant equations


3. The attempt at a solution

FC = FfB
mC * 9.81 = (6.0)(9.81)(0.30)
mC = 1.8 <---- :(

Obviously that was wrong haha. I then tried to figure out how the pulley affects the relationships of the forces, and figured:

FfB = MC(9.8-aA)
17.6 = MC(9.8-aA) <-----One equation, two unknowns. Need another equation, assuming this one is correct.
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
 
Last edited by a moderator:

tiny-tim

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Welcome to PF!

Hi DaftCrunk! Welcome to PF! :smile:
… Need another equation, assuming this one is correct.
Yup! … try F = ma for A-and-B. :wink:
 

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