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Elementary Science Education

Reply To: Help for Explaining Weightlessness

#8261
Bernard Nebel
Keymaster

This sounds fine. Plus, you illustrate an important aspect of learning. When you can take a concept and explain it your own words, it shows you have really mastered it. Nice work. However, I would make an adjustment to your line, ” The sensation of weightlessness does not mean you dont weigh anything at all.” This is where we should switch from speaking of weight to speaking of mass. That is, a scale will read different weights depending on gravity–zero in a state of free fall. But you and anything else remains constant. We speak of that “weight” that remains constant as mass and measure it in kilograms. That is, a mass of 10 kilograms will remain 10 kilograms regardless of any force of gravity including zero force.

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