Question

How much work can a 23,000 Watt car engine do in 35 seconds if it is 100% efficient?

Answer 1

Work done, W = 8,05,000 J

Step-by-step explanation:

It is given that,

Power of car engine, P = 23,000 watt

Time taken, t = 35 s

The work done per unit time is called the power of the car engine.

`P=(W)/(t)`

`W=P.t`

`W=23000* 35`

W = 8,05,000 J

Hence, this is the required solution

Answer 2

The power (P) is defined as the work done by the engine per unit of time:

`P= (W)/(t)`
Where W is the work and t the time. If the efficiency of the engine is 100% (like in this case), all the work done is converted into useful power, so we can use the previous equation. By rearranging it and by plugging in the numbers (P=23000 W and t=35 s), we can find the work done by the car engine:

`W=Pt=(23000 W)(35 s)=8.05 \cdot 10^5 J`