Physics

If A=250g at an angle of 0 degrees and B=150g at an angle of 120 degrees, what will C be? both magnitude and direction.

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asked by Mpho
  1. use law of cosines
    or, break into components and add x and y parts

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    posted by oobleck
  2. A + B = 250g[0o] + 150g[120o].
    X = 250 + 150*Cos120 = 175 Grams.
    Y = 150*sin120 = 130 grams.
    175 + 130i = 218g[36.6o] CCW.
    Tan A = Y/X.

    The magnitude and direction of C for equilibrium = 218g[36.6+180] =
    218g[216.6] CCW.

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    posted by henry2,

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