A force of ($7\widehat{i} + 6\widehat{k}$) N makes a body move on a rough plane with a velocity of ($3\widehat{j} + 4\widehat{k}$)$ms^{- 1}$. Calculate the power in watt

Question

Dr. Abubacker · Accepted Answer

(a) Power, $P = \overrightarrow{F}.\overrightarrow{v} = \left( 7\widehat{i} + 6\widehat{k} \right).\left( 3\widehat{j} + 4\widehat{k} \right) = 24$

Q. A force of ($7\widehat{i} + 6\widehat{k}$) N makes a body move on a rough plane with a velocity of ($3\widehat{j} + 4\widehat{k}$)$ms^{- 1}$. Calculate the power in watt

Explanation

Reviewed by Dr. Abubacker

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