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Hi, here in this given problem first of all we draw a cartesian plane, a cartesian plane having x -axis and y -axis.
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This is x -axis horizontal, this y -axis vertical.
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In this cartesian plane there are three vectors.
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First of all, vector a which is along x -axis, having a magnitude of 5 newton.
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Vector b which is along y axis having a magnitude of 10 newton and vector, sorry, this is vector, no, vector b is not along y.
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Vector b is inclined at an angle of 120 degree from the positive x -axis counterclockwise y's and vector c that is along negative y axis.
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So this is vector a, this is vector b, this is vector c.
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And this angle complete angle here, this is 120 degrees.
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So the angle of vector b with positive y x is that is just 30 degree.
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The magnitudes of the vectors for vector a that is 5 newton, for vector b this is 10 newton and for vector c this is 8 .0 newton.
01:37
In order to find the resultant magnitude of the resultant and direction of the resultant of these three vectors, we resolve the vectors into components.
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For vector a, that is purely ax, and that is 5 newton only, having no vertical component a, y, that is 0.
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Then for b, bx will be here this will be bx and this will be by.
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So bx will be b sine 30 degree, means this is 10 into sine 30 degree, that is 10...