A) - 7
B) + 7
C) + 10
D) + 13
Correct Answer: B
Solution :
[b] Work done in displacing the particle |
\[W=F.r=(5\hat{i}+3\hat{j}+2\hat{k}).(2\hat{i}-\hat{j})\] |
\[=5\times 2+3\times (-1)+2\times 0=10-3=7\,J\] |
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