A) 9.5W
B) 7.5W
C) 6.5 W
D) 4.5W
Correct Answer: A
Solution :
\[P=\frac{\vec{F}.\vec{s}}{t}=\frac{(2\hat{i}+3\hat{j}+4\hat{k}).(3\hat{i}+4\hat{j}+5\hat{k})}{4}\] \[=\frac{38}{4}=9.5\,W\]You need to login to perform this action.
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