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A force \vec{F}=2\hat{i}+2\hat{j}  newtons displaces a paritcle through  \vec{S}=2\hat{i}+2\hat{k} meter in 16 second the power developed by \vec{F}  is (in JS-1)

Option: 1

0.25


Option: 2

25


Option: 3

225


Option: 4

450


Answers (1)

best_answer

  

 Work done by this force is

\\*W=\vec{F}\cdot \vec{S}=(2\hat{l}+2\hat{j})\cdot (2\hat{l}+2\hat{k})=4J\\*\\*Power=\frac{W}{t}=\frac{4J}{16S}=0.25JS^{-1}

 

Posted by

HARSH KANKARIA

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