A) 16 J
B) 12 J
C) 8 J
D) Zero
Correct Answer: A
Solution :
Work done \[=\overrightarrow{F}.\overrightarrow{s}\] \[=(6\hat{i}+2\hat{j})\cdot (3\hat{i}-\hat{j})=6\times 3-2\times 1=18-2=16\,J\]
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