Question

If a force `vecF` applied on a body moves it with а velocity `vecv` then power will be ______.

विकल्प

• `(vecF)/(vecv)`

• `vecF * vecv`

• `F/vecv`

• `F  vecv`

Answer 1

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`