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Three forces with magnitudes 75 pound, 100 lb, and 125 pound act on an object at angles of 30 degrees, -45 degrees, and 120 degrees respectively. Find the direction and magnitude of the resultant vector.

  • Calculus -

    convert each to (x,y) coordinates
    add them up
    convert result back to speed and direction

    75 @ 30° = (64.95,37.50)

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