I was watching this video where the astronauts demonstrate how an object that would weigh some large amount on Earth is nearly weightless in the microgravity experienced onboard the ISS.
What I don't get is, how is it possible for the human to move the object with that relative ease (in comparison to the effort it would take them on Earth)? The mass of the human relative to the mass of that object is still the same. The weight/force acting on both (due to gravity) is the same. To my naive self, the force the muscles would have to apply to move the object remains the same (the mass of the object relative to the human's mass has not changed). Is it just that the rest of the force the muscles would have to deal with has dropped significantly? Is the force generated by the muscles constant irrespective of the gravity the body is subject to?
I do apologize if this is trivial and/or not addressable at this forum.