A) 9.5 W
B) 7.5 W
C) 6.5 W
D) 4.5 W
Correct Answer: A
Solution :
\[P=\frac{\overrightarrow{F}.\overrightarrow{s}}{t}=\frac{(2\hat{i}+3\hat{j}+4\hat{k}).(3\hat{i}+4\hat{j}+5\hat{k})}{4}\]\[=\frac{38}{4}=9.5\ W\]
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