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Gravitation (Class 11, CBSE) Video Lecture

FAQs on Gravitation (Class 11, CBSE) Video Lecture

1. What is the concept of gravitation?
Ans. Gravitation is the force of attraction that exists between any two objects with mass. It is responsible for the movement of planets, the moon, and other celestial bodies in the universe.
2. What are the factors that affect the force of gravitation?
Ans. The force of gravitation between two objects depends on two factors: the mass of the objects and the distance between them. As the mass of the objects increases, the force of gravitation also increases. However, as the distance between the objects increases, the force of gravitation decreases.
3. What is the law of universal gravitation?
Ans. The law of universal gravitation, formulated by Sir Isaac Newton, states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
4. How does the force of gravitation affect the motion of objects on Earth?
Ans. The force of gravitation pulls objects towards the center of the Earth, giving them weight. This force also affects the motion of objects by causing them to fall towards the Earth when released from a height. It is responsible for the acceleration due to gravity, which is approximately 9.8 m/s^2 on the surface of the Earth.
5. How does the force of gravitation explain the motion of planets in the solar system?
Ans. The force of gravitation between the Sun and the planets is responsible for the motion of planets in the solar system. The gravitational pull of the Sun keeps the planets in their orbits, preventing them from moving away into space. The force of gravitation also determines the shape of the planets' orbits and the time it takes for them to complete one revolution around the Sun.
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