Ted and Alice are working on some problems which involve representing systems of forces represented by vectors.

Ted and Alice are working on some problems which involve representing systems of forces represented by vectors.
Your task is to help them solve the following problem: (a) A force of (3i + 2j) Newtons acts at the point with position vector (2i – j) metres and a second force of (-3i + j) Newtons acts at the point with position vector (-3i – j) metres. Find the moment of the system about the point with position vector (I + 2j). Alice is working on a new design of roof truss. She explains to Ted how the forces acting in the wooden sections could be resolved into vertical and horizontal components using trigonometry. Use this technique to answer the question below.



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