Law of lever-arm is strictly valid, however lever-arms are to apply more or less helpful, e.g. by slinging, at rotating systems or by Double-Connecting-Rod
Nature aims balanced status, these are easy to disturbe, its automatic regeneration is usable for benefits: Perpetuum Mobile Third and Fourth Kind, example Electrostatic-Dynamo
Enormous forces come up by rotating un-balance, which are usable. Acceleration and deceleration around eccentric axis results symmetry-break and surplus-benefit, e.g. by Fire-Wheel-Motor