ch03-p016 - 16. If we wish to use Eq. 3-5 in an unmodified...

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16. If we wish to use Eq. 3-5 in an unmodified fashion, we should note that the angle between G C and the + x axis is 180° + 20.0° = 200°. (a) The x and y components of G B are given by B x = C x A x = (15.0 m) cos 200° – (12.0 m) cos 40° = –23.3 m, B y =C y A y = (15.0 m) sin 200° – (12.0 m) sin 40° = –12.8 m. Consequently, its magnitude is | | B = G 22 ( 23.3 m) ( 12.8 m) 26.6 m −+ −= . (b) The two possibilities presented by a simple calculation for the angle between
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