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What else can I help you with?
Why do gravity decreases towards the core of the earth?
Gravitational attraction is caused by the mass of the earth. As you go down in the earth, the amount of mass of earth still between you and the centre of earth decreases. Thus as this effective mass decreases, the gravitational attraction decreases.
Why all objects above the surface of the earth that are left without support fall down?
Objects above the surface of the Earth fall down due to the force of gravity. Gravity is the natural force of attraction that pulls objects towards the center of the Earth. Without a supporting force to counteract gravity, objects will fall towards the Earth's surface.
What depth from surface of earth is value of acceleration due to gravity one fourth the value at the earth surface?
The force of gravity is proportional to the masses of the two objects and inversely proportional to the square of the distance between them. As a result, a gravity of one fourth that on the surface of the Earth would be observable at an altitude equal to the radius of the Earth, i.e. 6400 km. Note: This is up, in the air, not down, into the Earth. This distance is in outer space.In the other direction, the force of gravity gets smaller as one goes deeper into the earth. This is because the mass outside your current radius (as you descend) does not contribute. The mass inside your current radius is proportional to the cube of the radius. Gravity is proportional to this mass divided by the square of the radius. Therefore, gravity decreases linearly with the radius. So the acceleration of gravity is equal to one fourth its value at the earth's surface at one fourth of the earth's radius, or a depth of approximately 4800 km.
What causes air preasure?
Air pressure is caused by the weight of air molecules pressing down on a surface due to gravity. The pressure decreases with increasing altitude as the column of air above decreases. Temperature, altitude, and weather patterns can also affect air pressure.
What outside force helps bring a rocket down to the surface of the Earth?
Gravity
What is the pull of gravity from 40 feet high?
When you say "high", I'm guessing you mean "above the Earth's surface". If that's true, then things weigh almost exactly the same up there as they do when they're down on the ground. The distance that affects the forces of gravity is the distance between the center of you and the center of the Earth. That distance doesn't change much when you move up 40 feet.
On the earth's surface, how much force does the pull of gravity have on 1 kilogram of mass?
The force of gravity on 1 kilogram of mass on the Earth's surface is approximately 9.8 newtons.
A force which pulls you down?
Gravity is the force that pulls objects towards each other, such as the force that pulls you down towards the Earth's surface.
What will happen to the value of g if the compound pendulum is taken nearer to the centre of earth?
The value of g would increase if the compound pendulum is taken nearer to the center of the Earth. This is because gravity is stronger closer to the Earth's surface. Conversely, if the compound pendulum is moved further away from the center of the Earth, the value of g would decrease.
What is caused by the earth pulling down on you?
Your weight, caused by the effect of gravity.
Is The earth's atmosphere held down to the surface by gravity?
Yes, and it stays put because the force of the Earth's gravity is stronger than the velocity that air molecules gain from temperature increases. Only the lightest molecules (hydrogen and helium) are lost to space again.
What effects does gravity have on Earth?
On the surface of the planet it causes objects to fall with an approximate acceleration of 9.8 meters per second per second. As you fly away from Earth, its gravitational pull decreases with the square of distance. As you dig down into Earth's core, its gravitational pull decreases linearly with proximity to the center of mass. At the exact center of Earth, there is no gravity. [But there is an enormous amount of pressure.]
