Contents

- 1 Is escape velocity independent of mass?
- 2 Why is escape speed independent?
- 3 Why escape velocity does not depend on mass of object?
- 4 How does escape speed vary with mass?
- 5 Does the escape speed of a body from the Earth depend on the mass of the body explain using formula?
- 6 On what factor does the escape speed from a surface depend?
- 7 Does escape velocity depend on density?
- 8 On what does the escape velocity of a body depend?
- 9 Does the escape velocity of a body from the Earth depends on a mass of the body II direction of projection?
- 10 Why does the escape velocity of a heavyweight star increases when it collapses?
- 11 What is the maximum value of G at poles?
- 12 Does the escape velocity of a body from the earth depends on a mass of the body II direction of projection?
- 13 How does escape velocity depend with the density of a planet?
- 14 Why don t stars collapse under the weight of their own gravity?
- 15 When a star collapses to form a black hole its mass?
- 16 What is zero at the centre of the earth?
- 17 Why gravity is minimum at equator?
- 18 Does the escape velocity depend on acceleration due to gravity?
- 19 What balances gravity pulling in on a star to prevent it from collapsing?
- 20 What prevents a neutron star from collapsing under its own gravity?
- 21 Why does the escape velocity of a heavyweight star increase when it collapses?
- 22 Can the sun become a black hole?
- 23 Why gravity is not a force?
- 24 Is there no gravity in the center of the Earth?
- 25 Does zero gravity exist?
- 26 Where is gravity strongest on earth?
- 27 Is escape velocity constant?
- 28 On which factors does the escape velocity of body from the surface of the Earth depend?
- 29 What keeps gravity from collapsing a main sequence star?
- 30 Why do neutron stars have an upper mass limit?

## Is escape velocity independent of mass?

**The escape velocity depends only on the mass and size of the object from which something is trying to escape**. The escape velocity from the Earth is the same for a pebble as it would be for the Space Shuttle. example #1: What is the escape velocity from the Earth?

## Why is escape speed independent?

Escape velocity is actually a speed (not a velocity) because **it does not specify a direction**: no matter what the direction of travel is, the object can escape the gravitational field (provided its path does not intersect the planet).

## Why escape velocity does not depend on mass of object?

**Escape velocity depends upon the acceleration due to gravity which in turn depends upon the Mass of the Earth**. Escape velocity depends upon the acceleration due to gravity which in turn depends upon the Universal Gravitational constant.

## How does escape speed vary with mass?

It purely depends on the distance of the object from the massive body and the mass of the massive body. **More the mass it will be higher, similarly, the closer distance, higher will be the escape velocity**.

## Does the escape speed of a body from the Earth depend on the mass of the body explain using formula?

Solution : The escape speed `v_(es)=sqrt((2GM)/R)=sqrt(gR)`. Hence, <br> **The escape speed of a body from the Earth does not depend on the mass of the body**.

## On what factor does the escape speed from a surface depend?

Solution : Escape speed depend on **acceleration due to gravity and radius of the Earth**. It is completely independent of the mass of the object.

## Does escape velocity depend on density?

**The escape velocity of an object from the earth depends upon the mass of the earth (M), its mean density (p)**. its radius (R) and the gravitational constant (G).

## On what does the escape velocity of a body depend?

The escape velocity 'v' of a body depends upon (1) **the acceleration due to gravity (g) of the planet and (2) the radius (R) of the planet**. Use the method of dimensions to obtain a relation between v, g and R. Was this answer helpful?

## Does the escape velocity of a body from the Earth depends on a mass of the body II direction of projection?

Solution : **The escape velocity is independent of the mass of body and the direction of projection**. It depends upon the gravitational potentail at a point from where the body is launched.

## Why does the escape velocity of a heavyweight star increases when it collapses?

But, when that star collapses to a smaller volume, **force due to whole mass on surface increases (because its inversely proportional to r) which makes escaping tougher** (required escape velocity increases).

## What is the maximum value of G at poles?

**The value of G is maximum at the poles**. This is due to the closeness between the poles and the center of the earth. Stay tuned with BYJU'S to learn more about other concepts such as the acceleration due to gravity.

## Does the escape velocity of a body from the earth depends on a mass of the body II direction of projection?

Solution : **The escape velocity is independent of the mass of body and the direction of projection**. It depends upon the gravitational potentail at a point from where the body is launched.

## How does escape velocity depend with the density of a planet?

Solution : Yes, escape velocity of a body is **directly proportional to the square root of the density**.

## Why don t stars collapse under the weight of their own gravity?

A star's life is a constant struggle against the force of gravity. Gravity constantly works to try and cause the star to collapse. **The star's core, however is very hot which creates pressure within the gas.** **This pressure counteracts the force of gravity, putting the star into what is called hydrostatic equilibrium**.

## When a star collapses to form a black hole its mass?

As the core is only about 20% of the mass of the star, most of the star expands out to form a nebula. The core becomes a black hole which still has the same mass as the core before collapse. So, **the mass of the star is preserved as black holes have all of the mass which went into them.**

## What is zero at the centre of the earth?

Since, **mass m of an object can never be 0**. Therefore, when F=0, then g has to be 0. Thus, the value of g is zero at the centre of Earth.

## Why gravity is minimum at equator?

As the radius decreases, the acceleration due to gravity increases. As the radius increases, the acceleration due to gravity decreases. **The earth looks like an ellipse in shape, so the radius value keeps on changing**. So, the acceleration due to gravity is minimum at the equator and maximum at poles.

## Does the escape velocity depend on acceleration due to gravity?

For a planet **the escape velocity (v) of a body depends upon the radius ( R) of the planet and acceleration due to gravity (g) .**

## What balances gravity pulling in on a star to prevent it from collapsing?

In the center of the star, temperatures and densities are so high that the **hydrogen fuses into helium**, producing the energy which heats the star and produces the gas pressure needed to resist the pull of gravity.

## What prevents a neutron star from collapsing under its own gravity?

Neutron stars are partially supported against further collapse by **neutron degeneracy pressure**, a phenomenon described by the Pauli exclusion principle, just as white dwarfs are supported against collapse by electron degeneracy pressure.

## Why does the escape velocity of a heavyweight star increase when it collapses?

But, when that star collapses to a smaller volume, **force due to whole mass on surface increases (because its inversely proportional to r) which makes escaping tougher** (required escape velocity increases).

## Can the sun become a black hole?

Will the Sun become a black hole? **No, it's too small for that**! The Sun would need to be about 20 times more massive to end its life as a black hole.

## Why gravity is not a force?

In general relativity, gravity is not a force between masses. Instead **gravity is an effect of the warping of space and time in the presence of mass**. Without a force acting upon it, an object will move in a straight line.

## Is there no gravity in the center of the Earth?

If you are at the center of the earth, **gravity is zero** because all the mass around you is pulling "up" (every direction there is up!).

## Does zero gravity exist?

If the spacecraft was not moving quickly enough, it would fall prey to the effects of earth's gravitational field and fall to the earth. **There is no such thing as zero gravity in space**. Gravity is everywhere in the universe and manifests itself in black holes, celestial orbits, ocean tides, and even our own weight.

## Where is gravity strongest on earth?

In general, the closer the centers of two objects, the greater the force of gravity becomes. Therefore, you would expect gravity in the United States to be stronger **wherever you are closest to the center of the Earth**.

## Is escape velocity constant?

Escape velocity refers to the minimum velocity which is needed to leave a planet or moon. For instance, for any rocket or some other object to leave a planet, it has to overcome the pull of gravity. **The formula for escape velocity comprises of a constant, G, which we refer to as the universal gravitational constant**.

## On which factors does the escape velocity of body from the surface of the Earth depend?

The escape velocity is independent of mass of the body and the direction of projection. It depends upon **the gravitational potential at the point from where the body is launched**. Since this potential depends on the height of the point of projection, the escape velocity depends on it.

## What keeps gravity from collapsing a main sequence star?

Stars are fueled by the nuclear fusion of hydrogen to form helium deep in their interiors. **The outflow of energy from the central regions of the star** provides the pressure necessary to keep the star from collapsing under its own weight and the energy by which it shines.

## Why do neutron stars have an upper mass limit?

There is an upper limit on the mass of a neutron star **because of neutron degeneracy pressure**.