Gravity

Its mass.

More mass=more gravity

Also the distance from the planet's center

to its surface, i.e. its radius.

1. it is 6 times less than gravity on earth

2.

3.

"Gravity" is the cause of orbital motion. No gravity . . . no orbits, and things

just sail away in straight lines. Without gravity, there's no such thing as a

satellite of anything.

A satellite small enough to be treated as a point particle. Can earth's gravity exert a torque on a satellite about the earth's center?

Torque causes an object to rotate around a specific point.

Torque = force * perpendicular distance

and

Torque = moment of Inertia * angular acceleration.

When a satellite is launched, it is forced up to a specific distance from the earth's center and accelerated to a specific velocity parallel to the surface of the earth. The satellite continues moving in circular orbit.

The force which causes the satellite to move in a circular path is the gravitational force caused by the mass of the earth, mass of the satellite, and distance from the center of mass of the earth to the center of mass of the satellite. This force causes the direction of the velocity to rotate so it is always tangent to the circle.

This force produces the torque which makes causes the satellite to rotate so the direction of its velocity is always perpendicular to the direction of the gravitational force.

1.63 newtons per kilogram. That compares with 9.81 at the Earth's surface.

Under the influence of gravity, every thrown object begins to accelerate downward

as soon as it leaves the hand. The point of the aim must be above the target in order

to compensate for the distance of fall during the object's flight time.

Who could improve on the fore going response.

However

If Isaac Newton was around he would argue that the force ,which exists between any 2 objects that have mass, changes with respect to the distance between these 2 objects i.e increases the closer they are together -reduces the further they are apart.

The specific force that has the designation 'g' refers to the force between the planet Earth and objects that reside on it.

This force weakens the further that an object moves further away from the surface of the Earth and also weakens as you move from the surface to the centre of the Earth. At that point g is zero.

However modern thinkers dismiss Newton's ideas

At least I can understand Newton

I'm buggered when I try to understand the new thinkers.

As an object falls, gravity acts as an external force pulling it downward. This force causes the object to accelerate as it falls towards the Earth's surface. The object's speed increases until it reaches terminal velocity, when the gravitational force pulling it down is balanced by the air resistance pushing against it.

gravity is a force that pulls us on to the ground and earth makes the gravity.In space there is no gravity (scientist call this zero gravity) so gravity isn't pulling the universe back because there is no gravity outside planets.

The main reason is because the Earth has

80 times as much mass as the Moon has.

a catapult yes. a trebuchet no

Sir Isaac Newton ( 1642 - 1727 )

the moon has less gravity because if you walk on the moon you would bounce not properly walk.

Gravity is strongest at the earths surface because it's atmosphere is v dense and so the force inc.this happens because force is directly proportional to density.

An urban legend.

It's more commonly said of eggs, but with sufficient care, it's possible to balance an egg on any day of the year. Similarly, if you can get a pop can to balance on one day, you can get it to balance on any day if you try.

the planets were formed by gravity because starts had gravity around them witch caused them to become bigger and be planets i think.. idk

Sorry, but earth is not a gravity free system. No matter where it is placed in the universe it will still have gravity that will affect all around it and that upon it.

Yes. Gravity is what keeps them in orbit. If it were not for gravity, those astronauts would continue out into space in a straight line.

It means that every part of him feels as if it weighs five times as much as it does

when he's sitting still on Earth. That makes it hard to breathe or to lift a finger.

No. That is why you wiegh less on the moon.

When two billiard balls collide, the total change in momentum is equal to zero according to the law of conservation of momentum. This means that the combined momentum of the two balls before the collision is equal to the combined momentum after the collision.

cavity and face