Gravitation

Answer

Gravitation is the universal force of attraction between any two objects in the universe. It was discovered by Sir Isaac Newton when he observed an apple falling vertically downward from a tree and re…

Answer

Centripetal force is the force that acts on any object moving in a circular path, directed towards the center of the circle. 'Centripetal' means center-seeking. Example: When you tie a stone to a stri…

Answer

Kepler's First Law: The orbit of a planet is an ellipse with the Sun at one of the foci. This means planets do not move in perfect circles but in oval-shaped paths called ellipses.

Answer

Kepler's Second Law: The line joining the planet and the Sun sweeps equal areas in equal intervals of time. This means when a planet is closer to the Sun, it moves faster, and when farther, it moves s…

Answer

Kepler's Third Law: The square of the period of revolution of a planet around the Sun is directly proportional to the cube of its mean distance from the Sun. Mathematically: T² ∝ r³ or T²/r³ = constan…

Answer

Every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them…

Answer

The value of G is 6.673 × 10⁻¹¹ N m² kg⁻². The unit of G in SI system is Newton meter squared per kilogram squared (N m² kg⁻²). G represents the gravitational force between two unit masses kept at uni…

Answer

Acceleration due to gravity (g) is the acceleration experienced by any object due to Earth's gravitational force. Its direction is towards the center of Earth (vertically downward). The value of g on …