The elevation, i.e. radius from the center of the Earth, is not constant around the Earth. You have mountains and you have oceans, with widely varying elevation. Also, the radius of the Earth at the equator is larger than the radius at the poles, also making a difference in elevation.
Recall that gravity is proportional to the masses of the two objects, i.e. you and the Earth, and inversely proportional to the square of the distance between them, i.e. the elevation.
Also, while it is convenient to simplify the graviometric representation of the Earth to a point located at its center, there are variations in density at various points which can cause variation in gravity, not just due to elevation.
The force of gravity is pretty much everywhere: if a mass is attracted to another mass, that is probably gravity. The source of gravity is mass, if you mean that. It's only really apparent from large masses such as planets, moons or stars. Since most of these are round (and rotationally symmetric), for calculation purposes you can consider the source of gravity to be at their center.
Since that is very near to Earth - compared to Earth's radius - the gravity will be almost the same as on the surface. If you want to know exactly how much the gravity gets reduced, look up the distance, and use the formula for gravitation.
The acceleration of gravity at the surface of Earth is approximately 9.81 meters per second squared.
Martian gravity is only 38% of the Earth's gravity.
The pen rests when not in motion due to gravity and surface contacts. When in motion, the pen moves due to external forces such as hand movement or air currents.
The gravity at the Bermuda triangle is exactly the same as the rest of the earth, affected only by the phases of the moon, exactly the same as the rest of the earth.
Yes. Gravity is exactly the same everywhere ... directly proportional to the product of two masses, and inversely proportional to the square of the distance between their centers. In the case of Venus, this means that the acceleration due to gravity on that planet's surface, as well as the mutual gravitational forces between the planet and any object on its surface, is roughly 90% of what it is on Earth's surface.
The earth is not perfect sphere therefore the radius differs from place to place and from Newton Gravitational law force is directly proportional to radius
Yes. Gravity exists everywhere. Within 200 km of its surface, Earth is the dominant gravitational body.
Everywhere. The zenith at a given point is the local vertical direction pointing away from the direction of the force of gravity at that location. In other words it is the point that is exactly straight up, no matter where you are on earth's surface.
Gravity behaves exactly the same on the moon as it does on earth. The formula that's used to calculate the gravitational force between two masses is the same formula everywhere. Using that formula, it's easy to calculate that any object weighs about 1/6th as much on the moon as it weighs on the earth.
A parachute works as the gravity allows the parachute to go up into the air, then the surface area is covered with air resistance.
Gravity on the moon has exactly the same characteristics and behavior as it has on Earth and everywhere else. It causes a pair of forces between any two objects, that are proportional to the product of the objects' masses and inversely proportional to the square of the distance between their centers. Because of the moon's much smaller mass, the force between the moon and an object on its surface is only about 16% as strong as the force between the Earth and the same object when the object is on the Earth's surface.
The force of gravity is pretty much everywhere: if a mass is attracted to another mass, that is probably gravity. The source of gravity is mass, if you mean that. It's only really apparent from large masses such as planets, moons or stars. Since most of these are round (and rotationally symmetric), for calculation purposes you can consider the source of gravity to be at their center.
The "downward" on the "curved surface" is a 3D model to explain and visualize the effect.
The pressure of gravity on a surface is(total force of gravity on the surface) divided by (area of the surface)
Gravity on the moon has exactly the same characteristics and behavior as it has on Earth and everywhere else. It causes a pair of forces between any two objects, that are proportional to the product of the objects' masses and inversely proportional to the square of the distance between their centers. Because of the moon's much smaller mass, the force between the moon and an object on its surface is only about 16% as strong as the force between the Earth and the same object when the object is on the Earth's surface.