• Bertuccio@lemmy.world
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    5 hours ago

    That is exactly the difference between weight and mass. And yes, that would be weightless and objects like balloons have negative weight until they reach an altitude where they’re neutrally bouyant and then are weightless.

    https://en.m.wikipedia.org/wiki/Weight

    Weight is defined as a force and has a direction. That’s what causes the movement. If the weight didn’t change there would be no movement.