Class 11 Physics - TELANGANA
Gravitation
The chapter Gravitation in Class 11 Physics for Telangana (TSBSE) students explores the attractive force acting between any two bodies in the universe. It covers Newton's universal law of gravitation, gravitational constant, acceleration due to gravity (g) and its variation with altitude, depth, and shape of the Earth. You will also learn about Kepler's laws of planetary motion, gravitational potential energy, gravitational potential, escape velocity, and the motion of satellites including geostorgary and polar satellites. Mastering this chapter is crucial for board exams as it forms the foundational mechanics required for advanced physics and regularly features numerical and derivation-based questions.
Start Learning FreeKey Concepts
Newton's Law of Gravitation
Every particle attracts every other particle in the universe with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
Acceleration due to Gravity (g)
The acceleration produced in a body due to the gravitational pull of the earth, which varies with height, depth, and latitude.
Kepler's Laws of Planetary Motion
Three empirical laws describing planetary motion: the law of orbits, the law of areas, and the law of periods.
Gravitational Potential Energy
The work done in bringing a mass from infinity to a point in gravitational field, given by the negative expression U = -GmM/r.
Escape Velocity
The minimum velocity required for an object to break free from the gravitational pull of a planet, independent of the object's mass.
Important Formulas
Board Exam Info
In the Telangana (TSBSE) Class 11 Physics exams, Gravitation typically carries around 6 to 8 marks. Expect one 2-mark very short answer question (VSAQ), one 4-mark short answer question (SAQ) such as the derivation of escape velocity or variation of 'g', and numerical problems.
Frequently Asked Questions
Does acceleration due to gravity (g) remain constant everywhere on Earth?
No, 'g' changes with altitude, depth, and the shape of the Earth because the Earth is not a perfect sphere and rotates on its axis.
Why does an astronaut feel weightlessness inside an orbiting satellite?
An astronaut feels weightlessness because both the astronaut and the satellite are in free fall towards the Earth with the same acceleration, making the normal reaction force zero.
What is the difference between gravitational mass and inertial mass?
Inertial mass measures a body's resistance to acceleration, while gravitational mass determines the gravitational force exerted by or on the body. Both are numerically equal.
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