Veljko Milković conducted a series of experiments on the basic model - mechanical hammer with a physical pendulum. All the experiments led to the conclusion that the input energy is smaller than the output energy. Since the law of energy sustainability could not help here, he did not spend too much time to explain the occurrence in a theoretical way
Traduco: non sa fare i calcoli o gli hanno dato risultati contrari alle aspettative
One of the possible explanations was the effect of the forces involved in the work of the oscillators. Forces are more specific and simple physical entities than energy. However, there were many different forces present during the experiments, so it was hard to compare them.
Dai, non è capace a fare i calcoli ma pretende di aver inventato il moto perpetuo. Che gli vuoi dire, a parte farsi vedere da uno bravo?