2006-09-07 22:01:39 · 7 answers · asked by sayantani 1 in Science & Mathematics ➔ Astronomy & Space
At the center of the earth, the earth's mass would have no gravitational effect on you. Half of the earth would be on one side of you and half would be on the other, so the gravitational effects would cancel each other out.
Of course, you'd be under tremendous pressure from all the mass that's being pulled towards the center of the earth, but that's another story. :-)
2006-09-08 01:58:31 · answer #1 · answered by Bramblyspam 7 · 0⤊ 0⤋
Because some of the Earth's mass is above you as you dig deeper in the Earth. Every atom in the Earth has a tiny bit of gravity; the Earth's gravity is just the sum of the gravity of all those little atoms. A nearby mountain's mass pulls you toward it and the mass of the ground 20 miles to the north pulls you that way and the mass of the ground 50 miles south pulls you that way and the mass in the core of the Earth pulls you straight down and the mass in Australia pulls you that way. Since the Earth is nearly a perfect sphere, mathematically, when you add up all the little gravity forces, total pull is toward the center of the earth's core. But if you dug a hole all the way to the core and went there, then there would be equal amounts of mass pulling you in every direction, including "up". So they all cancel each other out and there is no net gravity pulling you at all.
2006-09-08 01:46:57 · answer #2 · answered by campbelp2002 7 · 0⤊ 0⤋
No! If you drilled a hole through the center of the Earth, the acceleration of gravity would decrease with the radius on the way to the center of the Earth approaching 0.. But note that this would happen linearly only if the Earth were of uniform density ( which is not ).. In reality it varies
2006-09-07 22:22:05 · answer #3 · answered by MyStIcTrE3 3 · 1⤊ 1⤋
effective acceleration is difference between g and centripetal force. at poles centripetal force will be 0, thus effective acceleration increases.
At centre of earth, gravity from all directions cancel out each other. So g=0.
2006-09-10 23:47:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋
we feel gravitation when we are pulled by a heavy mass. when we r at the centre of the earth (assume yourself to be point mass) there is no mass to pull u towards itself. and as u r at the centre the surrounding layer's forces gets cancelled and so u fell no force on u.
2006-09-09 21:28:48 · answer #5 · answered by imfamouspersonality 1 · 0⤊ 0⤋
Acceleration due to gravity is inversionaly proportional to the mass of the earth.
Mass of the earth is minimum at the poles, so acceleration due to gravity is maximum.
But, mass of the earth is maximum at the equator, so acceleration due to gravity is minimum.
2006-09-07 22:22:53 · answer #6 · answered by mspentinum 3 · 0⤊ 2⤋
huh!?
2006-09-08 00:29:28 · answer #7 · answered by michael aguila 2 · 0⤊ 1⤋