ch03-p052 - 52. If we wish to use Eq. 3-5 directly, we...

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52. If we wish to use Eq. 3-5 directly, we should note that the angles for G G G QR S , and are 100°, 250° and 310°, respectively, if they are measured counterclockwise from the + x axis. (a) Using unit-vector notation, with the unit meter understood, we have () ˆˆ 10.0 cos 25.0 i 10.0sin 25.0 j 12.0cos 100 i 12.0sin 100 j 8.00cos 250 i 8.00sin 250 j 9.00cos 310 i 9.00sin 310
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