Stacey P.
asked • 03/05/23The vector u has length 19 and points at an angle of 20 degrees, The vector v has the length 15 and points at an angle of 30 degree. whats uxv=?
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Robert H. answered • 03/05/23
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I agree with the earlier comment from James B -- the problem needs additional information to allow a direction for the resulting vector to be determined.
From the information given, though, you can compute the magnitude of the resulting vector:
|u| * |v| * sin(angle between u and v) =
19 * 15 * sin(10 degrees) = 49.49
If, for example, u and v were in the xy plane, the resulting vector would be in the positive z direction.
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James B.
Hi, are you asking a question about the cross product? It seems to me that to calculate that we will need more details about u and v (namely their x, y, and z components) since the cross product with two vectors is only defined in a 3 dimensional space. Without additional components we cannot get a unit vector pointing in the direction of the cross product which allows us to calculate it. I hope I understood your question correctly. Thanks03/05/23