resultant forces - i 4 j N where i and j are unit vectors...

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Resultant Forces
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If two forces act together on an object, their effect may  be described as the action of one force.
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EXAMPLE Two forces of magnitude 5N and 6N act on a particle. They  act at right angles. Find the magnitude and direction of their  resultant.
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EXAMPLE Two forces acting on a particle have magnitudes 8N and  3N. The angle between their directions is 60 ° . Find the  resultant force acting on the particle.
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EXAMPLE Three forces (2 i  –  j ) N, 3i N and (-
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Unformatted text preview: i + 4 j ) N, where i and j are unit vectors due east and due north respectively, act on a particle. Find the magnitude and direction of the resulting force. EXAMPLE Forces P , Q and R act on a particle at O in the plane of the coordinate axes Ox , Oy , making angles p , q , r respectively with Ox in the first quadrant. P = 4 N, Q = 3 N, R = 6 N, p = 30°, q = 45°, r = 60°...
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