A) 10 m/s along X-axis
B) \[10\sqrt{3}\,m/s\]along Y-axis (perpendicular to X-axis)
C) \[10\sqrt{5}\,m/s\]along the bisection of the velocities of A and B
D) 30 m/s along negative X-axis
Correct Answer: B
Solution :
The component of velocity of B along x-direction \[{{v}_{Bx}}=20\cos {{60}^{o}}=20\times \frac{1}{2}=10\,m/s\] \[{{v}_{A}}=10\,\hat{i}\Rightarrow {{v}_{B}}=10\hat{i}+10\sqrt{3}j\] \[{{v}_{BA}}={{v}_{B}}-{{v}_{A}}=10\hat{i}+10\sqrt{3}\hat{j}-10\hat{i}=10\sqrt{3}\hat{j}\]You need to login to perform this action.
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