Mass and Weight
Learning Objectives
- Students will distinguish between mass and weight
- Students will calculate weight from mass
- Students will understand that weight varies with location
Core Concepts
- Mass: amount of matter (constant everywhere)
- Weight: gravitational force on mass (varies by location)
- W = mg relationship
Formulas
$$W = mg$$
Weight equals mass times gravitational acceleration
Units
| newton | N |
Interesting Fact
At Earth's equator, you weigh slightly less due to Earth's rotation
Key Scientist
Isaac Newton
Clarified the distinction between mass and weight
Modern Research
Spacecraft calculations must account for weight changes due to gravity at different locations; mass remains constant (ignoring relativity).
Want to truly master this? Try the interactive lesson!
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