What would happen if we put dynamo in the wheel of sewingmachine?

Question

suppose i 've taken the dynamo then i need to charge it only once then onwards it'd run automatically , bcoz of the cycling process in which sewing machine runs , produces the energy & dynamo gets charged automatically . is it the correct way i m thinking ???

Answer 1

I have the same idea in a different way:

What if I put a dynamo with an electric motor and the two are connected to an adapter in a series???

But that is not possible because it will voilate the Law of Conservation of Energy.

Answer 2

You are trying to invent perpetual motion. However, perpetua motion violates the laws of thermo dynamics. You can;t run a sewing maching by putting a dynamo on it to give you the energy to run it. There is such a thing as friction and it will run down.