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    QueenB8's Avatar
    QueenB8 Posts: 2, Reputation: 1
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    #1

    Nov 15, 2010, 06:30 PM
    Physics. HELP!
    Joe wishes to hang a sign weighing 7.50x10^2 so that cable A, attached to the store, makes a 30.0 degree angle. Cable B is horizontal and attached to an adjoining building. What is the tension of cable B?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Nov 15, 2010, 11:47 PM

    Make a sketch first.

    The tension in cable A can be resolved into a vertical and a horizontal component.

    The vertical component equals the weight of the sign and the horizontal component equals the tension in cable B.

    What do you get?
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