Post A Reply
my profile
|
directory
login
|
search
|
faq
|
forum home
»
Flare Sci-Fi Forums
»
Star Trek
»
Starships & Technology
»
New EAS Inconsistencies
» Post A Reply
Post A Reply
Login Name:
Password:
Message:
HTML is enabled.
UBB Code™ is enabled.
[QUOTE]Originally posted by Identity Crisis: [QB] [QUOTE]Originally posted by Timo: [qb]Identity Crisis already got the collision thing exactly right with his momentum analysis.[/qb][/QUOTE]I hope so. I did do a physics degree, it was a few years ago now but this is fairly basic stuff. [QUOTE][qb](And if you already defy the conservation of momentum, I'm sure you can rig up a perpetual motion machine to give you the required energy without the need for a fuel!)[/qb][/QUOTE]A PM device would give so many tech possibilities that it would redefine most of what we think we know about Trek science, so let's assume that there is no PM device and that transporters somehow conserver momentum. [QUOTE][qb]I'd be happier believing in a momentum-conserving transporter, though. But the momenta are still immense, since even though the masses of the people being moved are small, the distances and velocity differences are extreme. [/qb][/QUOTE]Momentum for an object in an orbit is given by p = mrw (where m is the mass of the orbiting object, r is the radius of the orbit and w is the angular velocity). For a ship in geostationery orbit over a beam down site the initial angular momentum is p1 = (m(ship) + m(party)) * r(orbit) * w When the party beam down they end up with momentum p2 = m(party) * r(planet) * w So the ship will now have momentum p3 = p1 - p2. But ths ship wants to remain above the landing site so must adjust it's momentum by firing thrusters. How big an adjustment must it make? Enough to make it's final momentum m(ship) * r(orbit) * w Fell free to work out the following for yourselves, I can't be arsed to type it out fully. MsRow = (Ms + Mp)Row - MpRpw + dp dp = MpRpw - MpRow dp = Mpw(Rp - Ro) As Rp is less than Ro the change in momentum required from the thrusters is negative, which is what we expect as the party lost momentum when it moved to the planet's surface and so the ship must have gained momentum. Ro is the killer. For Earth (Ro - Rp) is 35,787 km. If the ship drops down to a lower orbit for transport ops then the momentum change can be reduced considerably. [/QB][/QUOTE]
Instant Graemlins
Instant UBB Code™
What is UBB Code™?
Options
Disable Graemlins in this post.
*** Click here to review this topic. ***
© 1999-2024 Charles Capps
Powered by UBB.classic™ 6.7.3