A scale often displays kilograms because it is calibrated using Earth’s gravitational field, even though it responds to a force. Our display reports mass and gravitational weight separately. Changing worlds changes weight without changing the object’s mass. Both gauges use the same force calibration; their extension responds to force, not object size. These approximate surface comparisons do not model orbital apparent weightlessness.
Space · Discover & try
Would the same object weigh less on the Moon?
Reading level 5 of 5 · AdvancedChange
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Mass
A measure of matter and resistance to acceleration, in kilograms.
Weight
The gravitational force on an object, in newtons.
Gravitational acceleration
The local factor g relating mass to gravitational weight.
Watch · Try · Explain
See how it works
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Near-surface force comparison using rounded NASA values; not a model of orbit or apparent weightlessness.
What to look for
- Keep the kilogram label fixed while changing worlds.
- Compare force-gauge readings and extension on the same calibration.
- Double mass on one world.
Explain what you noticed
A three-kilogram instrument is moved from Earth to the Moon without losing any parts. What changes?
Keep this idea: Mass stays the same when location changes; weight depends on local gravity.
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Source material checked 2026-10-29. Explanations and activities by Nepedia. Source links do not imply endorsement.
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