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Acceleration in Space
In free space, far away from any influential gravity, if I were to shoot a
gun (bullet starts at 1000 ft/sec., or hit a golf ball with my driver, or even throw a baseball (you can plug in the arbitrary numbers for the initial acceleration), how far will these aforementioned objects travel? Will their speed EVER change? I know that this is probably a sophomoric question for most of you, but please indulge me. Thank you. Cordially, west |
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Acceleration in Space
On 2007-01-02 00:05:46 +0000, "west" said:
In free space, far away from any influential gravity, if I were to shoot a gun (bullet starts at 1000 ft/sec., or hit a golf ball with my driver, or even throw a baseball (you can plug in the arbitrary numbers for the initial acceleration), how far will these aforementioned objects travel? Will their speed EVER change? I know that this is probably a sophomoric question for most of you, but please indulge me. Thank you. Cordially, west With no retarding forces, it will travel forever... -- This space reserved for Jeff Relf's 5-dimensional metric. -- Posted via a free Usenet account from http://www.teranews.com |
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Acceleration in Space
west wrote: In free space, far away from any influential gravity, if I were to shoot a gun (bullet starts at 1000 ft/sec., or hit a golf ball with my driver, or even throw a baseball (you can plug in the arbitrary numbers for the initial acceleration), how far will these aforementioned objects travel? Will their speed EVER change? I know that this is probably a sophomoric question for most of you, but please indulge me. Thank you. Cordially, west Over billions of years, reverse compton effect (collisions with photons), and friction from collisions with atoms in space (there is thought to be no perfect vacuum) may slow those objects somewhat. Double-A |
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Acceleration in Space
In article ulhmh.8442$tc5.6642@trnddc01,
"west" wrote: In free space, far away from any influential gravity, if I were to shoot a gun (bullet starts at 1000 ft/sec., or hit a golf ball with my driver, or even throw a baseball (you can plug in the arbitrary numbers for the initial acceleration), how far will these aforementioned objects travel? Will their speed EVER change? I know that this is probably a sophomoric question for most of you, but please indulge me. Thank you. For any practical purpose they will travel as far as you like, and their speed will remain virtually constant. Even between galaxies there will be tiny amounts of material that create drag, but the timescales over which deceleration could be detected will be on the order of those over which you'd notice the objects losing mass due to evaporation, or having their trajectories bent by the nearest galaxy cluster. -- Odysseus |
#5
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Acceleration in Space
west wrote:
In free space, far away from any influential gravity, if I were to shoot a gun (bullet starts at 1000 ft/sec., or hit a golf ball with my driver, or even throw a baseball (you can plug in the arbitrary numbers for the initial acceleration), how far will these aforementioned objects travel? Will their speed EVER change? I know that this is probably a sophomoric question for most of you, but please indulge me. Thank you. Cordially, west The acceleration occurs while you are in contact with the bullet, golf ball, or baseball (or any other object). Once whatever force is imparted on the object ceases, the body will have reached a final velocity. Likely it will encounter something in its travels from that point on, but in principle, once that velocity is acheived, it will remain the same. |
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Acceleration in Space
West You got good answers here so far Let me get more technical. The
object for part of its spacetime is accelerating. How long before it reaches its top speed and coasts is tricky. Once in a spacetime of coasting it has lost its effect of acceleration which increases its inertia. Best to keep in mind inertia,,acceleration and gravity are indistinguishable. Note I added in inertia. Einstien only had acceleration and gravity. Now I could bring in Mach. but I'll stay with my thinking. Gravity will have the biggest effect on this free coasting along object. It will slow it down coming out of a gravity field,it will get it accelerating again going into a gravity field. If it comes to close and sling shoots the gravity body West you can view that like a comet,and how man uses Jupiter to have a probe gain speed. Gravity curving your object concave,and then convex,and convex back to concave etc. might be its biggest "rub" This is true of photons over long space journeys. The amazing thing about photons is they never change speed but the force of gravity can't alter their motion through space,but transfers its energy into the speed of their frequency(vibration). Gravity does this by changing the length of the photons wave. It all fits Bert |
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