1) Find addition of the given vectors: V1 = 2 m/s 30° N of E V2 = 3 m/s 40° N of W

Question

1) Find addition of the given vectors:
V1 = 2 m/s 30° N of E
V2 = 3 m/s 40° N of W

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Gerda 5 years 2021-07-21T16:57:54+00:00 1 Answers 21 views 0

Answers ( )

  1. Amity
    0
    2021-07-21T16:59:36+00:00
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    Unit vectors along N, S, E, W are i , -i , j, -j .

    To find unit vector along :

    V1 = 2 m/s 30° N of E

    V2 = 3 m/s 40° N of W

    a )

    v_1=2(cos\ 30^oi+ sin\ 30^oj)\\\\v_1=2(\dfrac{\sqrt{3}}{2}i+\dfrac{1}{2}j)\\\\v_1=\sqrt{3}i+j

    b )

    v_2=3(cos\ 40^oi+ sin\ 40^oj)\\\\v_2=3(0.77i+0.64j)\\\\v_2=2.31i+1.92j

    Hence, this is the required solution.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )