A) \[16\text{ }J\]
B) \[64\text{ }J\]
C) \[32\text{ }J\]
D) \[48\text{ }J\]
Correct Answer: B
Solution :
Work done \[=\vec{F}\,.\vec{d}\] \[=(4\hat{i}+\hat{j}+3\hat{k}).[(14-3)\hat{i}+(13-2)\hat{j}+(9-6)\hat{k}]\] \[=(4\hat{i}+\hat{j}+3\hat{k}).(11\hat{i}+11\hat{j}+3\hat{k})\] \[=44+11+9=64\,J\]You need to login to perform this action.
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