This example is going to look at a single lifting machine. All right. So this is just the machine. It's powered by an engine quantifying the work that the machine does Power provided by the machine and the power provided to the machine by the engine. And then we're going to find the efficiency of the machine. All right. So, we have some numbers here. We have This machine is going to be with switching a mass of 3000 kg and it's going to be lifting it to a height of 8.00 m and it's going to do that and 20.0. All right. So, the first thing we want to do is calculate the work output. So, in other work out in force times distance And our force is going to be our 3000 kilograms Times are acceleration to your gravity. So 9.81 m per second square, which will give us Newman Times Distance race, which is our 8.0 m here is um Yes. All right. That's going to give us work in jewels. Which is what we want to work out equals 235 killer jewels. Right next from that. We want to calculate the power and we know that is just work over time. Um, Uh huh. So, power out equals our work out which was 235 killer jewels Divided by the time it took, which we were given as 20 seconds. Not equals 11.8 kill a lot. Okay, the next part is pretty straightforward. Um, were given the power input in horsepower. We want to convert that to kilowatts. Um, so we need our conversion factors. We have 18 horsepower And we know that one hp equals time .746. Your rituals See that over one hp. And that. I'm sorry, I killed your skill. And that gives us a Power input of 13.4 kW. Okay, so that's up power in next. We wanna calculate the efficiency efficiency, which we know is either power of overpower in why work out over work. And you can use either one of these. I'll use power because the numbers are in my head. So we have workout 11.8, 2, lots Over work in 13.4 kW. And that's going to give us ratio of 0.87. Okay, so our efficiency is 88%. So pretty simple and straight forward on that.