Levers a made for to lift heavy things and to make it easier to lift . You can use it to help people like when you see a person trying to lift something then say do you need help lifting that then if they say yes then you check if there is a lever nearby and use it and try to lift the thing that the person is trying to lift .

A lever a like a kids seesaw but a bigger version of it.When you put a ton on a lever that means you are putting 2 000 tons on a lever and when there is a person putting weight on the other side of the lever then you can lift 2 000 tons but you have to put a fulcrum under the lever so when you put weight on both sides of the lever the you will be able you lift 2 000 tons .If you lift 2 000 tons it will be very hard to lift is I think that to adults can lift it but if you use a lever to lift it then it well be much easier.