400 lb F1 = 400 j F2 = -600 k 37 F3 = 500 sin 45 i-500 cos 45 k 3 3 7 r2=? 600 lb r3=? 45 M- rixF,, M,- r2x F M,- r3x F, M-M, + M, + M, 500 lb
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