Gravitation Concepts and Newton's Discovery

Gravitation

• Gravitation is a universal force, acting between any two objects in the universe
• It wasn't just discovered between earth and objects on it but extends to the entire universe
• Sir Isaac Newton discovered gravitation by observing an apple falling from a tree
• The apple fell vertically downwards, not at an angle, leading Newton to the idea of earth's attraction
• The force of attraction is towards the earth's center
• The direction from the apple to the earth's center is the vertical direction

Concept of Gravitational Force

• The gravitational force between the Earth and the apple is directed towards the Earth's center (vertically).
• The gravitational force between the Earth and the moon is directed towards the Earth's center
• The force of attraction is independent of the height
• The Force could affect objects much farther from the Earth
• Examples include the moon and other planets.

Newton's Observation

• Newton observed that the apple fell vertically downwards.
• He wondered why apples fall vertically and not horizontally.
• Newton concluded that Earth's attraction towards its center causes the apple to fall vertically.

This quiz explores the fundamental concepts of gravitation, including Newton's observations and the universal nature of gravitational force. Test your understanding of how this force acts between various objects in the universe, including between the Earth, moon, and other celestial bodies.