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Simple Pulley has me flumouxed!

  1. Dec 5, 2012 #1
    1. The problem statement, all variables and given/known data
    Sorry to be posting here but trying to look for previous similar questions I just managed to baffle me further!
    This is just me trying to revise and came across this..

    Two masses of 10 kg and 5 kg are joined by a cable and placed over a massless frictionless pulley as shown in the diagram. Find the Tension.

    http___moodlebcuacuk_tee_pluginfile.png


    2. Relevant equations

    F= ma

    3. The attempt at a solution

    Mass A = 10kg x gravity
    = 98.1 N

    Mass B = 49.05 N

    So I end up getting the tension above B as 49.05 from 98.1 - 49.05..

    Know that isn't right..
    Any help would be brilliant
     
    Last edited: Dec 5, 2012
  2. jcsd
  3. Dec 5, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    Draw a Free Body Diagram for each mass. Write an expression for the acceleration of each mass from the FBD (should include a term for the tension in each case). Solve the equations.
     
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