A) 200 J/s
B) 40J/s
C) 140 J/s
D) 170 J/s
Correct Answer: C
Solution :
\[\overrightarrow{v}=(5\hat{i}-3\hat{j}+6\hat{k})m/s\] \[\overrightarrow{F}=(10\hat{i}+10\hat{j}+20\hat{k})N\] \[\therefore \] Power \[\overrightarrow{P}=\overrightarrow{F}.\overrightarrow{v}\] \[=(10\hat{i}+10\hat{j}+20\hat{k}).(5\hat{i}-3\hat{j}+6\hat{k})\] \[=50-30+120\] \[=140W=140J/s\]You need to login to perform this action.
You will be redirected in
3 sec