Gravity
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Gravity is an invisible force that attracts all matter in the universe. Sir Isaac Newton discovered gravity after observing an apple fall from a tree. Gravity makes things move by pushing or pulling on them with a force that decreases with distance from the attracting mass. Gravity holds you down on Earth by attracting your body mass to the planet's mass, and allows astronauts to jump higher on the Moon where gravity is weaker due to the smaller lunar mass. While mass stays the same anywhere, weight varies with gravitational force in different locations.
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3) The Sun's gravity keeps the planets in orbit around it, with the strength of its gravitational pull on each planet determined by the planet's mass and its distance from the Sun.Ad
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Gravity
- 2. What is Gravity? Gravity is the invisible force of attraction between every bit of matter in the universe.
- 3. Who did discover the Gravity? The mathematician and physicist Sir Isaac Newton is said to have developed his ideas about gravity while sitting one day under an apple tree.
- 4. What is a Force? A force makes something move, by pushing or pulling it. Gravity is an invisible force.
- 5. Does Gravity change? An objects gravitational pull changes with its mass and distance. In fact, gravity decrease precisely in proportion to its distance .
- 6. How does Gravity hold you down? The mutual gravitational attraction between the mass of your body and the mass of the Earth pulls them together.
- 7. Why can you jump higher on the Moon? The Moon is much smaller than the Earth, so its gravity is much weaker. Astronauts weigh six times less on the Moon than they do on the Earth, and can jump much higher.
- 8. Whats the difference between mass and weight? Mass is the amount of matter in a object. It is the same wherever you measure it, even on the Moon. Weight is a measure of the force of gravity on a object. It varies according to where you measure it.
- 9. THANK YOU!