2006-07-12 07:42:44 · 20 answers · asked by Anonymous in Education & Reference ➔ Trivia
gravity
2006-07-12 07:43:55 · answer #1 · answered by green is clean 4 · 0⤊ 0⤋
Blame it on Earth's Gravity & the atmosphere it holds.
Just like, a fly stays inside the train compartment even when the train goes as fast as 50 miles an hour. They fly doesn't fly that fast but continues to be in the train without effort.
The atmosphere is the reason.
The Earth has an atmosphere around it up to certain altitudes. If is oval in shape & rotates round its imaginary axis carrying that atmosphere with it.
If one goes out of this atmospheric ring, one will sure to fall off.
Using this fact, there are projects to cover long distances in moments using a plane that goes out of the ring & comes back into it after a calculated time to reach any place on the earth.
Hope this is clear.
2006-07-17 14:46:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Because the force of gravity holding you on the earth is greater than the centrifugal force due to the earth's rotation which is pulling you away from the earth.
In fact, since their is no centrifugal force acting on you when you stand on the north or south poles, but the force of gravity is the same everywhere, therefore you weigh a bit more at the poles than elsewhere. Obviously, you would weigh the least at the equator. It's left to the student to calculate the difference in weights.
2006-07-12 15:40:23 · answer #3 · answered by OR1234 7 · 0⤊ 0⤋
PEOPLE Rotation does not cause gravity!!! Gravity is an attracitve force between objects with mass it dosent matter if they are rotating. Infact the rotation of the earth causes the force of gravity to be slightly less. DONT OUR SCHOOLS TEACH PHYSICS ANY MORE!!! Im sorry for the outburst because most of the people know what they are talking about and the rest of you need to take some physics.
2006-07-12 15:21:15 · answer #4 · answered by Daniel L 2 · 0⤊ 0⤋
Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together.
Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.
Since gravitational force is happening to all matter (objects) in the universe, from the largest galaxies down to the smallest atoms, it is often called universal gravitation. Sir Isaac Newton was the first to fully recognize that the force holding any object to the earth is the same as the force holding the moon, the planets, and other heavenly bodies in their orbits. According to Newton's law of universal gravitation any two masses in the universe attract each other with a gravitational pull. The size of this force is given by:
F=GmM / r (square)
F is the force between two masses (in Newtons)
m and M are the two masses (in kilograms)
R is the distance between the center of these masses (in metres)
G is the universal constant of gravitation (6.7 x 10-11 Nm2/kg2)
Gravitation is actually a very weak force. The pull is too weak to be felt between two people and it is not even strong enough to pull together two lumps of lead placed right next to each other. It is only when one of the masses is the size of a planet that we can feel the force of gravity.
2006-07-12 14:49:58 · answer #5 · answered by pratapjames 2 · 0⤊ 0⤋
Gravity
2006-07-12 14:44:57 · answer #6 · answered by courage 6 · 0⤊ 0⤋
It doesn't spin FAST ENOUGH to spin things out into space -- not even much of the atmosphere.
In fact, it takes nearly 18,000 miles an hour to achieve orbit and 25,000 miles an hour to escape earth's gravity.
BTW, if by some magic the earth screeched to a halt and stopped rotating, the atmosphere would continue to swirl --at 1,000 miles per hour, and sandblast the continents down to bedrock.
2006-07-12 14:48:23 · answer #7 · answered by urbancoyote 7 · 0⤊ 0⤋
The rotation is what causes the gravity which holds us down. When it STOPS spinning is when we're in trouble.
2006-07-12 15:06:20 · answer #8 · answered by cross-stitch kelly 7 · 0⤊ 0⤋
The centrficual force from the spinning of the earth creates the gravitational pull, that holds people down to the ground.
2006-07-12 14:46:57 · answer #9 · answered by creskin 4 · 0⤊ 0⤋
Gravity I guess. But the funny thing is that gravity, this force that totally controls everything around us, is one of if not the weakest of all forces in the universe. Freaky!
2006-07-12 15:27:16 · answer #10 · answered by Anonymous · 0⤊ 0⤋
centrifugal force! but then does that mean if the earth stops spinning we will fall off? ...the earth spins at about a thousand miles per hour but because of the sheer size of the earth we do not feel it
2006-07-12 14:49:27 · answer #11 · answered by cookiesmom 7 · 0⤊ 0⤋