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an-aeroplane-a-is-flying-horizontally-due-east-at-a-speed-of-400km-hr

Solution: \(\begin{array}{l}\vec{V}_{A}=400\hat{i}\end{array} \) \(\begin{array}{l}\vec{V}_{B}=vBcos 30^{\circ}\hat{i}+vBsin 30^{\circ}\hat{j}\end{array} \) \(\begin{array}{l}\vec{V}_{B}=\frac{vB\sqrt{3}}{2}\hat{i}+\frac{vB}{2}\hat{j}\end{array} \) \(\begin{array}{l}\vec V_{\frac{B}{A}}= \vec V_B-\vec V_A \vec\end{array} \) \(\begin{array}{l}V_{B}=(vB\frac{\sqrt{3}}{2}\hat{i}+\frac{vb}{2}\hat{j})-400\hat{i} \vec \end{array} \)... View Article

a-man-walking-downhill-with-velocity-v0

a)\(\begin{array}{l}\frac{\sqrt{63}V_{0}}{3}\end{array} \) b)\(\begin{array}{l}\frac{\sqrt{73}V_{0}}{3}\end{array} \) c)\(\begin{array}{l}\frac{\sqrt{87}V_{0}}{3}\end{array} \) d)\(\begin{array}{l}\frac{\sqrt{71}V_{0}}{3}\end{array} \) Solution: b) \(\begin{array}{l}\frac{\sqrt{73}V_{0}}{3}\end{array} \)