The current best estimate for the mass of Earth is M⊕ = 5.9722×1024 kg, with a standard uncertainty of 6×1020 kg (relative uncertainty 10−4). The recommended value in 1976 was (5.9742±0.0036)×1024 kg. It is equivalent to an average density of 5515 kg·m−3.

**Table of Contents**show

## What are the topics in gravitation Class 11?

- The universal law of gravitation.
- Acceleration due to gravity.
- Kepler’s laws of planetary motion.
- Gravitational potential energy; gravitational potential.
- Escape velocity. Orbital velocity of a satellite. Geostationary satellites.

## What is physics 11th gravitation?

• Newton’s Law of Gravitation Newton’s law of gravitation states that 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.

## What is gravitation short note?

Gravity, also called gravitation, is a force that exists among all material objects in the universe. For any two objects or particles having nonzero mass, the force of gravity tends to attract them toward each other. Gravity operates on objects of all sizes, from subatomic particles to clusters of galaxies.

## What is gravitational force Class 11 formula?

The mathematical formula of the Law of Gravitation is: F = Gm1m2/ r2. In the above formula: F: The Gravitational force between two objects measured in Newton (N). G: It is the Universal Gravitational Constant which has a standard value of 6.674 × 10-11 Nm2kg-2.

## Is gravitation Chapter easy?

Gravitation is an easy to understand and a highly scoring topic. Not the most important.

## Can I study gravitation without rotation?

Apparently you can study the Gravitation without studying the Rotational motion, just by knowing the dynamics such as Centripetal Force, Centrifugal force (just the formulae).

## What is gravity caused by?

Earth’s gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That’s what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.

## What is the SI unit of gravitation?

What is Electromagnetic Force? The electromagnetic force is a type of physical interaction that occurs between electrically charged particles. It acts between charged particles and is the combination of all magnetic and electrical forces. The electromagnetic force can be attractive or repulsive.

## What are the 3 laws of gravity?

Now, the gravitational force is another type of force. So, the SI unit of gravitational force will be the same as the SI unit of force which is N (newton). And, the SI unit of mass is kg. Note: The gravitational force between two objects of mass Mand m separated at a distance r, is F=GMmr2.

## What is the unit of force?

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

## What is the value of G?

The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.

## What are the types of force?

- Applied Force.
- Gravitational Force.
- Normal Force.
- Frictional Force.
- Air Resistance Force.
- Tension Force.
- Spring Force.

## What are 3 examples of gravity?

- The force that holds the gases in the sun.
- The force that causes a ball you throw in the air to come down again.
- The force that causes a car to coast downhill even when you aren’t stepping on the gas.
- The force that causes a glass you drop to fall to the floor.

## Is gravitation important for NEET?

The acceleration due to gravity on Earth or the value of g on Earth is 9.8 m/s2.

## What is difference between mass and weight?

Important notes of Physics for NEET, JEE for Gravitation are useful for all aspirants preparing for entrance exams including JEE, NEET. Important notes are also helpful for revision when you have less time and have to study many topics.

## What should I study before gravitation?

Mass is the measure of the amount of matter in a body. Mass is denoted using m or M. Weight is the measure of the amount of force acting on a mass due to the acceleration due to gravity. Weight usually is denoted by W.

## Is gravity a force or wave?

If you wish to know the prerequisites for this chapter then you need to have a clear concept about Mechanics, Newton’s laws of motion, equation of motion and also idea about Work, potential and Energy concept.

## Can sound affect gravity?

Gravity is a force. For all other forces that we are aware of (electromagnetic force, weak decay force, strong nuclear force) we have identified particles that transmit the forces at a quantum level. In quantum theory, each particle acts both as a particle AND a wave.

## What kind of force is gravitation?

According to the researchers’ equations, sound that carries one watt of power for one second in air — comparable to that from heavy thunder — will generate an equivalent of 10 milligrams of gravitational mass. These findings not only suggest that sound has gravitational mass, but that such mass is negative.

## Who found gravity?

Legend has it that Isaac Newton formulated gravitational theory in 1665 or 1666 after watching an apple fall and asking why the apple fell straight down, rather than sideways or even upward.

## Is gravity a law or theory?

Gravitational force is a non-contact force. For action of gravitational force, contact with an object is not required. The force of gravity acts on all object at all the time even while not in contact with the earth.

## How is g calculated?

Universal Gravity is a theory, not a fact, regarding the natural law of attraction. This material should be approached with an open mind, studied carefully, and critically considered. The Universal Theory of Gravity is often taught in schools as a fact, when in fact it is not even a good theory.

## What g means in physics?

gravitational constant (G), physical constant denoted by G and used in calculating the gravitational attraction between two objects.

## What is weak nuclear force Class 11?

The acceleration g=F/m1 due to gravity on the Earth can be calculated by substituting the mass and radii of the Earth into the above equation and hence g= 9.81 m s-2.