gafferuk

That I understand, so as gravity is a constant force, the planets should slow down.

please explain this: how can something at a certain speed stop the object from ever slowing down because of gravity? I would thought that eventually the planets would spiral to the sun guaranteed! and would not take that long. What is the speed of the planet moving divided by the fall of the planet from the suns gravity? Thats a good start. is this greater or lesser than 1?. Planets move quite quick, but the gravity it receives is very little. I can not understand how something with a constant force being applied to it like gravity will NEVER slow down and spiral to the sun. Merged post follows: Consecutive posts merged get a brain? did it not make you think i was on about an object moving away from a planet and gravity pulling it back to the planet? Merged post follows: Consecutive posts mergedGravity is a pulling force, it pulls you back, so things effected by gravity must one day slow down, guaranteed! even if it takes 1,000,000,000,000,000,000,000,000 years. A planet going around the sun has energy but no force as it has no little jet packs. Gravity is a force constantly being applied to the planet. So it should slow down quite quickly. But as the planets have been going round for billions of years, i doubt it is gravity doing it's thing but griff energy.

As all you can tel me is it is oposing forces that creates an orbit. i fail to see where you have explained yourself many times. Gravity is a pulling force, it pulls you back, so things effected by gravity must one day slow down, guaranteed! even if it takes 1,000,000,000,000,000,000,000,000 years.

how can something at a certain speed stop the object from ever slowing down because of gravity? I would thought that eventually the planets would spiral to the sun guaranteed! and would not take that long. What is the speed of the planet moving divided by the fall of the planet from the suns gravity? Thats a good start. is this greater or lesser than 1? that number which im sure is less than 1 is the amount it would slow down by. I can not understand how something with a constant force being applied to it like gravity will NEVER slow down and spiral to the sun.

So what you are saying is a aeroplane flying around the planet at 1 meter only travelling at 100 miles an hour stoped it's engine will fall to the earth guaranteed. But the same plane going at a very fast speed and turns off it's enging will never hit the earth?

I would think that as gravity is a constant force, this would be guaranteed. EVERYTHING i know of 1 meter above the earths surface will fall without power EVENTUALLY regardless of how fast it is moving. If the planets will never slow down then it's griff energy doing its thing, else it's gavity energy doing it's thing and one day the planets will spiral to the sun guaranteed!

How can they not slow down but i do when I jump?

if i jump i fall, how can going sideways at any speed stop me from EVER falling? EVENTUALLY as gravity is pulling i must slow down. This is where i just don't understand what you are saying. Does the word "weightless" exist?

Then things everywhere are effected by gravity as stated by newtons law, so then EVENTUALLY the planets will spiral to the sun GUARANTEED! Merged post follows: Consecutive posts merged so in space, the ball spins FOREVER!?

if i spin a ball on a string here on earth, if i dont keep it spinning it slows down. Why do the planets not slow down?

Im sat in a chain on earth, gravity keeps me on the seat. If i stick the chain on a 100 mile pole and sat on the chain, and jumped a little, would i float off NEVER to return or would i EVENTUALLY return to the seat?

So which of these statements is true? 1: I fall when I jump, because of the force of gravity. So one day the planets should fall too, because of gravity. 2: when you leaves earths orbit you start to float in the space craft as you have left the gravitatonal pull of the planet behind you.

I know what one is but know litle of math. What does "Not if they remain in equilibrium" mean? I just want to know if ONE DAY the planets will slow down and fall/spiral towards the sun? I fall when I jump, because of the force of gravity. So one day the planets should fall too, because of gravity. Merged post follows: Consecutive posts mergedWhat I was told is when you leaves earths orbit you start to float in the space craft as you have left the gravitatonal pull of the planet behind you.

Then the planets are constantly being effected by gravity too, so just as in i jump i EVENTUALLY slow down and fall, so will the planets as there effected by gravity too. So one day the planets will hit the sun? Merged post follows: Consecutive posts merged So far I have not been told anything new.

Read the first post if you like, and yea, it became unpopular on another forum.

I can't understand that below escape velocity im effected by gravity and above im not. I would of though that in theory EVENTUALLY i would be effected by the planets gravity.

So a fired bullet at a speed less than escape velocity receives a constant force from the earths gravity and falls back to the ground. But a bullet fired faster than escape velocity still receives a force from earths gravity but is going too fast too be effected much by the gravity resistance and flyes off forever. Gravity is a force so makes me fall. Why does the escaped velocity bullet not eventualy fall too? From what I believed is only if I fire a bulllet high enough can it reach orbit. Now Im being told I could in theory reach orbit the height of a mouse. Lets ignore air resistance in the future. Ive never heard of reaching orbit the height of a mouse as im sure someone would of created a toy. Does than mean we could have tv satalites above our houses and they no require energy to float? And aeroplanes going at escape velocity dont need to keep there engiines on and can fly around the planet at the height of a tree forever? This really is "back to the future" hover board technology were talking here.

Thats strange, so you fire a bullet at a speed below escape velocity it slows down because of gravity. And if you fire a bullet faster than escape velocity it does not slow down because of gravity and flyes off forever?

But why does it not slow down because of the costant force of gravity? I do when I jump. Can I reach orbit at a height of a tree?

It is known that once you reach outspace you are no longer effected by earths gravity, and the space men start to float inside there little space crafts. So how does the moon go around? Because of Griff Energy! Merged post follows: Consecutive posts mergedSo if i could go from 0 to escape velocity speed in a fraction of a second, i could turn off my engines before I reach the height of a tree and land on the moon?

Im falling back down becase im losing energy because of gravity. So the planets should lose energy too. Why does a firework once gone out fall back to the ground? How does one escape velocity?

ok, confusion with force and energy, so ill repeat. When I jump I use force, when im in the air going upwards i have energy. why does the force of gravity make me "lose" energy and return to the earth and why does the planets "not lose" energy because of the suns gravity force constantly being applied?

why do i lose this force and not the planets? remember movement is a force. a snooker ball hiting another releases its energy to the other ball. proof movement is a force!. So i ask again, why do i lose this force and not the planets? why do the days not get longer? as the planets slow down because of the suns gravity applied to it just as in i jump? Your basicly saying that gravity is different than it is in space. That can't be true unless gravity does not reach out in to outer space.

Apart from calling me a idiot, what are you trying to say? that newtons law IS FACT?