Question

5.

(a)

$V_{1x}=-6.6\: units,V_{1y}=0$

$V_{2x}=8.5\cos 55^{\degree}\: units=4.88\: units,V_{2y}=8.5\sin55^{\degree}\: units=6.96\: units$

(b)

$\vec V=(V_{1x}+V_{2x})\hat x+(V_{1y}+V_{2y})\hat y$

$\vec V=-1.72\hat x+6.96\hat y$

$|\vec V|=\sqrt {(-1.72)^2+6.96^2}=7.17\: units$

$\theta=180^{\degree}-\tan^{-1}\left ( \frac {6.96}{1.72} \right )=132.42^{\degree}$

(c)

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