A) 10 m along north
B) 10 m along south
C) 10 m along west
D) 0.
Correct Answer: C
Solution :
In context to figure, the displacement \[\overrightarrow{OC}\]of the person is given by \[\overrightarrow{OC}=\overrightarrow{OA}+\overrightarrow{AB}+\overrightarrow{BC}\] or,\[\overrightarrow{OC}=30\,\hat{J}+20\hat{i}-30\sqrt{2}\cos {{45}^{o}}\hat{i}-30\sqrt{2}\sin {{45}^{o}}\hat{j}\]\[=(30-30)\hat{j}\,+(20-30)\hat{i}\] \[=10\,\hat{i}\] So, the displacement of the person is 10 m along west. Hence, the correction option is [c].You need to login to perform this action.
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