Question

While rowing across the lake during a race, John does 3,960 J of work on the oars in 60.0 s. What is his power output in watts?

Answer 1

`66 W`

Explanation:

Formula of Power:

`color(blue)((Wo rk)/(time taken))`

Given: Work = `3960 J` and time taken = `60.0s`

Using the formula:

`color(blue)((Wo rk)/(time taken))`

= `(3960 J)/(60.0 s)`

= `66 W`

Answer 2

`66` watts

Explanation:

Power is calculated through the equation,

`P=W/t`

• `W` is the work done in joules

• `t` is the time in seconds

So, we got:

`P=(3960 \ "J")/(60 \ "s")`

`=66 \ "W"`