Math

If vector u = 20 m �due North and vector v =10 m � at 30 degrees East of North, find u + v and u − v.

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  1. u = (20cos90, 20sin90) = (0 , 20)
    v = (10cos60, 10sin60) = (5 , 5√3)

    u+v = (5 , 20 + 5√3)
    u - v = (-5 , 20 - 5√3)

    check by making a vector diagram sketch

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  2. calculations

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  3. if vector u =20m due north and vector v =10m at 30 degrees E of N,find u + v and u - v.

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