Physics 1: Algebra Based

Circular Motion and Gravitation

# Applications of Circular Motion and Gravitation

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Applications of Circular Motion and Gravitation

Basics of Circular Motion and Gravitation

- Objects move in a
**circular path**due to a force that pulls them towards the centre, known as centripetal force. **Centripetal Force**refers to the 'centre-seeking' force that makes body follow a curved path, its direction is always orthogonal to the velocity of the body- Circular motion obeys
**Newton’s Laws of Motion**, similar to linear motion. - An object will continue moving in a uniform circular motion until an external force acts upon it.

Applications of Circular Motion

**Satellites**moving around a planet follow a circular path due to gravity, showcasing an application of circular motion.- The
**spin of the Earth**represents circular motion, with gravity holding everything towards the Earth’s centre. **Roller coasters and Funfair rides**like the 'rotor ride' or 'pirate-ship' are real life examples where circular motion principles are employed.- In sports, discus throw, long jump, hammer throw and other athletic games involve the principles of circular motion.
- Technologies using
**magnetic resonance imaging**(MRI) use principles of circular motion and rotation of atoms.

Understanding Gravitation

- Every particle in the universe
**attracts every other particle**with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them - This is the**Law of Universal Gravitation**. - The force of gravity decreases as the
**square of the distance**increases between two objects. **Acceleration due to gravity**is the uniform acceleration produced in a freely falling object due to gravitational pull of earth. It is represented by ‘g’, and on the surface of the earth, the value of ‘g’ is approximately 9.8 m/s².- Gravitational potential energy is energy an object possesses because of its position in a gravitational field.

Applications of Gravitational Force

**Planetary orbits**are maintained by the balance of gravitational forces and the inertia of the planets.**GPS technology**relies on understanding gravitational forces to calculate precise locations.- Gravitational principles are used in designing structures: bridges, buildings, etc, to resist gravitational force.
**Aerospace technology**heavily depends on the understanding of gravitational force.