What is Center of Gravity?
79440
center of gravity \n\nThe point in any solid where a single applied force could support it; the point where the mass of the object is equally balanced. The center of gravity is also called the center of mass. When a man on a ladder leans sideways so far that his center of gravity is no longer over his feet, he begins to fall.
907263
my answer might be childish,but one can understand it easily\nThe gravitational force of earth acting at any point on its surface has a direction towards center of earth.Every matter on the surface is pulled towards the center of earth with this gravitational force.\ndo u know the value of this sticking force acting on every one kg of matter on earth--it is about 10N
51910
Weight is a force, but when something is weighed you actually measure it's mass assuming you are in an environment in which the force of gravity is constant (i.e., you're at a fixed location <radius from the center> on a planet or massive planetary mass).\n\nof course, one's mass can be approximated by W=mg at fixed radii from such planetary masses (like the earth, a massive asteroid, a superdense star, whatever...) if the force of gravity, g, is known at that radius.\n\nThere are 2 possible variables here - mass and the force of gravity.  Which one do you know?  usually an approximation for g is given.  Which one do you measure, then...that would be mass.
251177
I think,to a good approximation, at the centre you would not feel an appreciable gravitational field from the mass of the earth. \n\nIt's a nice result in physics that if you're on the interior of a spherical shell of mass then you feel no gravitational force. You can think of the centre as being surrounded by layer after layer of spherical shells of radius ~0 up to the radius of the earth.\n\nIf you do the calculation, once you start going interior to the earth the gravitational attraction varies linearly with distance from the centre-going from 9.81m/s^2 at the surface to 0 m/s^2 at the centre.\n\nOutrageous!
268172
I'm not sure what you mean by the question. Gravity is a conservative force, which means that it is path-independant. Since an orbit by definition starts and ends at the same place (i'm assuming that the planets have perfect orbits for simplicity, which won't be true but will probably be nearly true), then the planets have effectly travelled a zero-length path. This means that the energy difference between start and finish is 0. The orbits contain no energy.
710706
Gravity, friction and centrifigul.  Don't forget various applications of force = leverage, pulleys.
730247
Yes, there is gravity at the center of the earth, but it would exert the same force in all directions at once, resulting in a net acceleration of zero.  Therefore, yes, you would float in the same manner as if you were in outer space.
653943
gravity and inertia\n\nread more below. It is really fascinating.
121405
zero gravity happens when your weight equal zero because \nW(weight)=M(mass)xG(gravitional force)G IS 0 When u r in space   nothing like a planet or moon affects you as long as you r far from them
842967
Gravity is a condition of the space-time continuum which is associated with mass.  Every object which has a mass will have a gravitational attraction to any other close object with a mass.\n\nThe planet Earth has a mass, and therefore has a "gravity."
649714
lots of gravity,  bends anything.
720515
centre of gravity of both pans along with arms of the balance lies just below the fulcrum,when it is tilted ,the centre of gravity tries to balance the weight hence stops with a little tilt.
46266
When it is said that that the net force is zero, it means yes, there is gravitational forces acting at the cenetr of the earth, but being at the center, with equal amounts of earth mass in every direction, the forces pulling on you at the center would all cancel each other out, resulting in the <perception> of having no forces acting on you, when in reality, gravity is always at work.
770211
each and every material is pulled towards the centre of the earth due to gravitational force.  since the object itself is placed at a depth equal to the radius of the earth, which means it is placed at the centre of the earth, it would not be pulled towards any point and hence the gravity at that point is zero.  when gravity is zero, naturally the weight is also zero.  but remember, there won't be any change in the mass of the body.
83009
Center of gravity is not a point but is a line of action of force...\nSince a line is of infinite lenght there is no way you can think of the center of gravity of an object which does not pass through the object.\n\nhttp://www.schoolingkids.com/\n\nhttp://www.futureaccountant.com/
897360
No, u will stuck in center. As it is familiar that the earth is more or less spherical in shape. So the "point of gravity" lies at the centre of the earth (the core we say).\n\nSo when u jump into that whole (which u digged) u will go inside, due to gravity. Once u reach the mid point (core), the gravity becomes zero. But with the old force, u will move further, making negative gravity, (that is gravity in opposite direction), from the opp direction, u will come back to the centre. \nThis will repeat until the gravity becomes zero, after that u will stuk up at the core.
903577
You basically just asked this!!\n\nMass is the amount of matter in your body, weight is how much gravity is pulling on you.