Mass v Weight, Earth Moon and Space.

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SUMMARY

The discussion clarifies the distinction between mass and weight, emphasizing that mass remains constant regardless of location while weight varies based on gravitational pull. On Earth, a mass of 100kg corresponds to a weight of 981N, while on the Moon, the same mass results in a weight of 167N. In the absence of gravity, such as in space, the weight is 0N, but the mass remains 100kg. The conversation highlights the importance of understanding these concepts for accurate measurements in different gravitational environments.

PREREQUISITES
  • Understanding of basic physics concepts, specifically mass and weight.
  • Familiarity with gravitational forces and their effects on objects.
  • Knowledge of measurement units, particularly kilograms (kg) and newtons (N).
  • Awareness of the differences between scales used on Earth and in space.
NEXT STEPS
  • Research the principles of gravitational force and its impact on weight.
  • Explore the differences between mass and weight in various gravitational fields.
  • Learn about the operation of scales in different environments, including space.
  • Investigate the physics of pivot balances and their use in measuring mass.
USEFUL FOR

Students, educators, and professionals in physics, engineering, and space exploration who seek to deepen their understanding of mass and weight in various gravitational contexts.

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We all know the confusion between Mass and Weight, from the language barrier. Would I be correct to say that:
On Earth
Bathroom weigh scales = 100kg. Mass therefore is 100kg. Weight = 981N

On the Moon
Bathroom weigh scales = 16.7kg. Mass is still 100kg. Weight = 167N

In Space, (away from any gravitational pull)
Bathroom Weigh scales = 0kg. Mass is still 100kg. Weight = 0N
 
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Seems right enough to me. You could add that the apparent 'weight', measured on a pivot balance (see saw) would always be the same as a 100kg standard mass when there is even a hint of gravity and a planetary surface / platform to measure on.
 
Sounds reasonable to me.
 

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