Lever violates the conservation of energy.

However, the longer the arm is raised, the more work is done, and the more gravitational potential energy is generated.

In this process, the human body consumes more chemical energy.

And the phenomenon you mentioned does not violate the law of conservation of energy.

I can lift 500 newtons of stone 1 m and make 500 joules.

I can also lift 10 meter 500 newtons of stone ... of course, 10 times ... to make 5000 joules.

The gravitational potential energy generated at this time is 10 times that of the first time. ...

So it does not violate the law of conservation of energy.

I hope I can help you. Welcome questions.

Take my answer as the best answer! thank you

Landlord, let me add.

Doing work is equal to the force multiplied by the distance, the force is constant, the distance is multiplied by 10, doing work is 10, and the energy consumed is 10.

By the way, there is one more question. How did you raise the stone 10 meter with a lever? The same force, you have to move 10 meters! If you move 1 m and1m with the same force, the energy consumed is naturally 10 times.