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Question
If a force `vecF` applied on a body moves it with а velocity `vecv` then power will be ______.
Options
`(vecF)/(vecv)`
`vecF * vecv`
`F/vecv`
`F vecv`
MCQ
Fill in the Blanks
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Solution
If a force `vecF` applied on a body moves it with а velocity `vecv` then power will be `bbunderline(vecF * vecv)`.
Explanation:
Power is the rate of doing work.
`P = (dW)/(dt)`
Since,
dW = `vecF * dvecs`
`vecv = (dvecs)/(dt)`
∴ P = `vecF * vecv`
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