2007-06-13 05:28:49 · 11 answers · asked by bunglebush 1 in Science & Mathematics ➔ Physics
if you stop relative to the earth you are still orbiting the sun. if you stop relative to the sun you are still moving in the universe. if you stop relative to the universe you are still expanding from the big bang?
2007-06-13 05:34:28 · update #1
Yes, to do this you need to apply a force equal and opposite to your current momentum and direction of travel.
Of course, "stopping" is a term which must be placed relative to another object (i.e. space craft, planet etc.). In affect, you are really only matching the speed and direction of travel of the benchmark object such that your distance is kept constant.
2007-06-13 05:30:45 · answer #1 · answered by Kevin S 2 · 1⤊ 1⤋
There is no concept of absolute rest (or absolute velocity) in the universe. Its all relative to the observers reference frame.
To make any changes in your velocity you need to push of something else (force). Yep, space is an almost perfect vacuum making it a little difficult.
Details:
You can' stop relative to the Universe! To make such an observation the reference frame would have to be outside the Universe and even then your velocity would be in respect to some space.
Remember that when physicists say the universe is expanding they mean that space itself is expanding. All points in space move away from each other. This dose not affect an objects velocity within any reference frame because the object (and its trajectory) is expanding along with reference frame.
2007-06-13 05:36:03 · answer #2 · answered by kennyk 4 · 1⤊ 0⤋
If you move as fast as the light (the speed that universe is expanding) then yes you can stop relative to the universe. Now you havent't stop relative to god... lol
2007-06-13 05:40:32 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Relative motion is just that - relative to a point of reference.
If your frame of reference is the universe, then no, nothing can be said to be "at rest" because of gravity.
2007-06-13 05:37:39 · answer #4 · answered by lunatic 7 · 0⤊ 1⤋
there is nothing to define whether u r moving or at rest. there is no hypothetical medium ether as explained by newton to describe the state of motion or rest. if u r talking about absolute rest u can not but if u r talking about relative rest u can.
2007-06-13 05:45:00 · answer #5 · answered by muqeem 2 · 0⤊ 0⤋
Yes/No... if you have an source that can exert an external force yes (i.e. some sort of propulsion system ie rocket motor/compressed gas)... if it's only you and you do not have a source of potential energy to tap, you can only redirect the momtentum you have (i.e. make yourself spin) but you cannot bring yourself to a complete stop - due to the conservation of momentum in a closed system.
2007-06-13 05:41:31 · answer #6 · answered by Dan 2 · 1⤊ 0⤋
Unless you apply a force opposite to your direction of motion, its pretty hard for you to stop in space as space is considered to be a vacuum and hence zero friction.
2007-06-13 05:31:57 · answer #7 · answered by Maddy 2 · 2⤊ 0⤋
Nothing is at rest in the universe.
2007-06-16 05:06:04 · answer #8 · answered by johnandeileen2000 7 · 0⤊ 0⤋
First you have to define what do you mean by stop. You have to define a frame of reference with respect to which you are stopping.
Once you figure that out, in order to change your velocity, you need to push off of something (by contact or indirect force) or throw something.
2007-06-13 05:31:24 · answer #9 · answered by Anonymous · 3⤊ 0⤋
i go with bekki b
2007-06-13 06:05:59 · answer #10 · answered by gigili baba serious guy 2 · 0⤊ 0⤋