求翻译一道英文的物理题Find the sum of the following four vectors ((a) and (b) for x and y components respectively), and as (c) a magnitude and (d) an angle relative to +x (including sign plus or minus).P: 6.8 m, at 34o counterclockwise fro
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求翻译一道英文的物理题Find the sum of the following four vectors ((a) and (b) for x and y components respectively), and as (c) a magnitude and (d) an angle relative to +x (including sign plus or minus).P: 6.8 m, at 34o counterclockwise fro
求翻译一道英文的物理题
Find the sum of the following four vectors ((a) and (b) for x and y components respectively), and as (c) a magnitude and (d) an angle relative to +x (including sign plus or minus).
P: 6.8 m, at 34o counterclockwise from +x
Q: 21 m, at 6.5o counterclockwise from +y
R: 8.9 m, at 31o clockwise from -y
S: 6.9 m, at 37o counterclockwise from -y
求翻译一道英文的物理题Find the sum of the following four vectors ((a) and (b) for x and y components respectively), and as (c) a magnitude and (d) an angle relative to +x (including sign plus or minus).P: 6.8 m, at 34o counterclockwise fro
已知下列四个向量
P：6.8米,方向为x轴正方向逆时针旋转34度
Q：21米,方向为y轴正方向逆时针旋转6.5度
R：8.9米,方向为y轴负方向顺时针旋转31度
S：6.9米,方向为y轴负方向逆时针旋转37度
求
1）向量之和的x轴分量
2）向量之和的y轴分量
3）向量之和在x轴正方向上的长度（要带正负符号）
及4）向量之和与x轴正方向的夹角（要带正负符号）
太难了。