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    kidd24's Avatar
    kidd24 Posts: 1, Reputation: 1
    New Member
     
    #1

    Nov 26, 2007, 05:59 PM
    Resultant vector of 3 forces
    Find the resultant vector of this problem.

    A 15 N force pulls at 15 degrees. A 20 N force pulls at 95 degrees and a 30 N force pulls at 270 degrees.
    asterisk_man's Avatar
    asterisk_man Posts: 476, Reputation: 32
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    #2

    Nov 26, 2007, 07:03 PM
    The way to go is to convert all vectors into their x and y components and then just add all the x and add all the y and then convert that pair into a magnitude/direction.

    For example, for the 15 N force @ 15 degrees we can say the x component is 15cos(15) and the y component is 15sin(15).

    Hope that helps.
    terryg752's Avatar
    terryg752 Posts: 197, Reputation: 4
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    #3

    Nov 26, 2007, 11:08 PM
    For Resultant R: (inclined at angle A to the X - Axis)

    X component =X = R Cos A = 15 cos 15 + 20 cos 95 + 30 cos 270

    Y component = Y = R sin A = 15 sin 15 + 20 sin 95 + 30 sin 270


    R^2 = X^2 + Y^2

    Tan A = Y/X

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