how comes we dont fly off into space like when you spin a roundabout too fast and your m8 gets flung off?
2006-08-22 20:58:44 · 21 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
centrafugal force
2006-08-22 21:00:11 · answer #1 · answered by lickintonight 4 · 1⤊ 5⤋
Hello, it spins wayyy too slowly for that. If you spin a roundabout at a pace of 1 turn per 24 hours, nothing would get flung off!!
2006-08-23 06:27:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The mass of the Earth exerts a gravitational force upon us that holds us and everything else (from the oceans to the atmosphere) to it. The Earth revolves extremely quickly at a rate of 465 m/s at the equator so gravity is quite a useful force.
The reason places like Mars or the Moon can not support an atmosphere is because they have insufficient gravity to hold on to the gases which would form the atmosphere's in these places.
2006-08-23 04:27:31 · answer #3 · answered by Crash 2 · 0⤊ 1⤋
Thats because although the earth spins on its axis,it only revolves once every 24 hours,which gives us our day and night.This is much too slow to "throw" us off and its this slow speed that creates just enough gravity(in conjunction with the pull of the moon)for us to remain intact upon the surface
2006-08-23 05:01:48 · answer #4 · answered by Mick H 3 · 0⤊ 0⤋
Acceleration due to rotation is equal to the square of the rotational speed, divided by the radius.
The speed at the equator is 464.3 metres per second; squared that comes to 215,608 sq m per sq sec. Divide by the equatorial radius of 6,367,350 and you get...
0.0339m/sec/sec. Compared with the acceleration due to gravity (9.807m/sec/sec) that's about 3 parts in a thousand!!
So a kilogram weight is lifted to the tune of about 3 grams.
However, that 0.3% lift means the earth bulges slightly, so at the equator you are about 20km further from the centre of the earth than at the poles. It is this extra distance, rather than the direct centrifugal force, that creates the roughly 1% difference in gravity between poles and equator.
2006-08-23 11:57:06 · answer #5 · answered by Paul FB 3 · 0⤊ 0⤋
You do weight slightly less at the equator than at the pole, because of centrifugal force, but not much less. The Earth is rotating too slowly to overcome gravity. It takes a whole day just to go around once.
2006-08-23 09:29:09 · answer #6 · answered by campbelp2002 7 · 0⤊ 0⤋
the earth spins on its axixs which takes 24houres for it to spin once around its axis so there for it spins very slow. the other reason we dont fling off is because the earth travels around the son at the speed of 107,000 km an houre which creats the gravity.
2006-08-23 07:11:20 · answer #7 · answered by Taouk 1 · 0⤊ 0⤋
the moons gravity keeps us down that's why waves go up then fall and if the moon stopped we would stop and the ultimate catapult wud be built. that means our gravity must be keeping Venus up right because it has no moons and if we stopped we fly off sumwhere, go into our atmosphere and evaporate (and if outr sun was to bea black hole we would die) and if antares the biggest star possibly in the universe was our star we would melt)
spin round one day pretend your dog is the moon and your dog was to run after the postman STOP now you go flying away onto the road thats just like what happens on earth
2006-08-25 15:15:38 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Gravity
2006-08-23 04:00:30 · answer #9 · answered by charlie6091 2 · 0⤊ 1⤋
1 - Gravity holds us on the earth, why do you think rocket engines are so big and powerful
2 - the earth is not spinning around that fast - think about it, theres 24 hours in the day, then 365 days in the year
2006-08-23 04:07:03 · answer #10 · answered by Anonymous · 0⤊ 1⤋
It does have a very small effect to throw us off. Spacecraft are launched near the equator to take advantage of this.
2006-08-23 04:24:32 · answer #11 · answered by bwadsp 5 · 1⤊ 0⤋