A) \[\frac{124}{7}\]
B) \[\frac{120}{7}\]
C) \[\frac{115}{7}\]
D) None
Correct Answer: A
Solution :
Total force \[\overrightarrow{F}=3\left( \frac{6\hat{i}+2\hat{j}+3\hat{k}}{7} \right)+4\left( \frac{3\hat{i}-2\hat{j}+6\hat{k}}{7} \right)\] \[=\frac{1}{7}\left( 30\hat{i}-2\hat{j}+33\hat{k} \right)\] displacement\[\overrightarrow{d}=2\hat{i}+\hat{j}+2\hat{k},\] \[W=\overrightarrow{F}\cdot \overrightarrow{d}=\frac{124}{7}\]You need to login to perform this action.
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