Curriculum
Science — First Preparatory
Unit 1: Matter
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Unit 2: Forces
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Unit 3: Life
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Unit 4: Earth and Space
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Text lesson
Gravitational Forces
Gravitational Forces
Lesson summary
Lesson summary
- Gravity is an attractive force between any two objects with mass. It increases with the masses and decreases with the distance between them.
- Mass is the amount of matter and is measured in kilograms; weight is a force and is measured in newtons.
- Weight W = m × g, where g ≈ 9.8 N/kg on the Earth and 1.6 N/kg on the Moon.
- Weight changes from place to place, but mass stays the same.
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