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Homework Help: Physics tension help

  1. Jun 8, 2013 #1
    1. The problem statement, all variables and given/known data

    2. A mass M=169 kg is suspended from the end of a uniform boom.The boom (mass=90.0 kg, length=3.60 m) is at an angle θ=68.0 deg from the vertical, and is supported at its mid-point by a horizontal cable and by a pivot at its base. Calculate the tension in the horizontal cable.

    2. Relevant equations


    3. The attempt at a solution

    i am not sure how to solve for tension when given an angle. i know i need to use sin(68) somewhere in the problem i am just confused as to where
  2. jcsd
  3. Jun 8, 2013 #2
    This is again a static equilibrium problem. You need a review, I am afraid.
  4. Jun 8, 2013 #3


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    Can you draw the diagram confidently, showing all the forces? What are all the forces (magnitude, direction, line of action - use symbols for unknowns as necessary)? Do you know how to resolve a force at an angle into X and Y components? Can you then write the various force and torque equilibrium equations?
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