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Sling Shot Theory

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#26 Rick Woods

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Posted 13 December 2013 - 10:46 AM

I always thought "Sling Shot Theory" was:

If you shoot a sling shot at a 700lb. Bengal Tiger often enough you will get him mad enough that he will scale a 20ft wall and eat your *BLEEP*.

That's no theory!

I was going to post exactly that, but I deleted it!

Eh, no guts, no glory.
No pain, no gain.
No... ow! :slap:

#27 medic32v



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Posted 13 December 2013 - 06:43 PM

Ok let's figure this out. If Mercury was in the same orbit as Jupiter, and they were opposite ends of their orbits. Will each maintain the same velocity. Or would catch up with the other. Or would each have the same velocity.and if not who would overcome whom. And does mass have any involvement in this case. And Groz this mane a tough one.a lot of Pysiics invoked

c. Clear Skies Mike
Thanks all and Clear Skies mikeq

#28 llanitedave


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Posted 13 December 2013 - 07:25 PM

If Mercury and Jupiter were exactly the same distance from the Sun, in exactly opposite directions, and moving at exactly the same angular velocity, and there were no other gravitational influences involved, the orbits would not be stable over a long period, because the center of mass of the entire system would change relative to the three. The system's mass would be the sum of the three bodies, and the center of that mass would be offset slightly towards Jupiter since its mass is greater than Mercury's. Therefore Jupiter would be closer to the center of mass of the system, and orbit slightly faster, so it would catch up with Mercury.

If both bodies were the exact same distance from the center of mass, then they would orbit at the same velocity in a stable orbit, although Mercury would always be thousands of miles closer to the Sun than Jupiter would.

#29 PhilCo126



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Posted 15 December 2013 - 11:29 AM

To find out more: read " Ambassadors From Earth - Pioneering Explorations with Unmanned Spacecraft " by Jay Gallentine ( University of Nebraska Press)

#30 StupendousMan


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Posted 15 December 2013 - 10:25 PM

Here is a very simple -- but pretty accurate -- analogy.

a) stand by the side of an empty road with a tennis ball. Gently toss the tennis ball straight across the road toward the other side. The ball will move straight across the road.

b) now, hold the tennis ball again, but this time wait for a truck to approach. Just as the truck passes you, toss the tennis ball in front of the truck. The truck and ball will bounce off each other ... but because the mass of the ball is so much smaller, it will end up flying down the road, ahead of the truck, while the truck slows down by an imperceptible amount.

Ball = spacecraft, truck = planet.

As long as you can arrange things so that a planet is moving in the direction you want to go, this is a really good method of picking up extra speed.

#31 llanitedave


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Posted 16 December 2013 - 12:05 AM

Try not to break the truck's headlight.

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