when are we ever going to use this?

When are we ever going to use this?

Do kids in school still say that? Well, here's an example. Let's say that you have a little first calf heifer and she is calving and you realize that the calving ease bull that you bred her to has given her a calf the size of a shetland pony and that that thing (pony calf) is never coming out of this thing (cow vagina) without your help.

So you put your calving chains on the calf's legs. And you could (either) pull with all your might. This might work okay if you are 6'3" and 210 pounds. But if you're 5'2" and 120 pounds, you're not going to do anything but exhaust yourself. So (or) get your 7th physics book out and make yourself a second class lever like you learned about. Attach a rope from the calving chains to a post behind the cow. Now you can lean on the rope with all your weight (effort). The rope will go down some with your force. But by the time that force is applied to the calf (resistance), which is a much shorter distance from the cow (fulcrum) than you are, the force applied will be much greater. You will help the cow get the calf out and be awesome.

And that, dear children, is when you are going to use this.
You can use "pull a calf" in the "give your own example" section on this page:
http://www.schools.utah.gov/curr/science/sciber00/8th/machines/sciber/lever2.htm