Question

An engine puts out 635 J of work over 45 s. Calculate how much power was generated.

Answer 1

Given:

The work done by the engine is: W = 635 J

The work is done over the time of: t = 45 s

To find:

The power generated.

Step-by-step explanation:

Power is defined as the rate of doing work. It is the amount of energy consumed over time t.

Let P be the power, W be the work done by the engine over time t, then

`P=(W)/(t)`

Substitute the values in the above equation, we get:

`\begin{gathered} P=\frac{635\text{ J}}{45\text{ s}} \\ \\ P=14.11\text{ J/s} \\ \\ P=14.11\text{ watts} \end{gathered}`

Final answer:

The power generated by the engine is 14.11 watts.