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Physics, Astronomy & Cosmology / Re: Can a mass be lifted with force less than its weight ?
« on: Today at 13:08:36 »
I think I know the error this poster is making. In a healthy person of ~70kg the nervous system has adapted to the work in, for example standing up from a seated position, and the process feels close to effortless. Now that same person is asked to lift 20kg and a significant effort is required because that is an extra load that his(her) neuromuscular system is not accustomed to. If one was to strap a 20kg to oneself it would be quite noticeable as requiring an extra effort to stand up. Left there over a prolonged period it would become unnoticeable as the neuromuscular system adapts to the new load. Good to see you posting again, Origin, best wishes from "da Grinch"