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Tension on a piano cable

  1. Aug 6, 2006 #1
    A 500 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, 15 degrees below horizontal, with 500 N of tension. Ellen's rope pulls toward the right, 25 degrees below horizontal.

    What is the tension in the main cable supporting the piano?

    I found that the tension in Ellens rope was 533 N but I have no idea how to figure out the tension force in the main cable...can anybody help?? :confused:
     
  2. jcsd
  3. Aug 6, 2006 #2

    Andrew Mason

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    What can you say about the horizontal components of the tension in the two ropes? (Hint:Does the piano accelerate horizontally?)

    AM
     
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