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Homework Statement
Forces F1 = −j + 3k, F2 = j + k and F3 = −2i +j act at the point (0,−1, 2), (−1, 0, 3) and (1, 1, 0) respectively.
(a) Find the total force and the total moment about the origin.
(b) Find an equivalent system of forces consisting of a single force acting at the point (1, 0, 0) together with a couple.
Homework Equations
M = r*F
The Attempt at a Solution
(a) For total force I suppose I just add the forces together. So FT = -2i + j + 4k.
Then I got the three moments separately, added them up and got MT = -4i + j +2k
(b) I wasn't sure what to do, but I just multiplied (1,0,0) by the Total Force which I worked out already, and I got -4j +k.
Please tell me if I used the correct method. Thanks!
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