Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -


  • Please log in to reply
22 replies to this topic

#21 d3k3

d3k3

    Senior Member

  • Members
  • PipPipPipPip
  • 590 posts

Posted 13 November 2010 - 03:36 PM

Even if the pure slingshot without using the engines is debatable in this scenario you could definitely use the Oberth effect to dramatically reduce the amount of fuel needed to launch rockets into space. The rocket could accelerate from the surface toward the center of the earth without burning any fuel at all and then fire its engines when it reached the center. It could then achieve the escape velocity using a lot less fuel than would require in a conventional launch.


It is not debatable. You need to be in a different orbit than the body you get the slingshot from. Period.

You make a good point about the Oberth effect, but I'm not sure how it would work in this situation. One problem is that the math no longer behaves when you're "orbiting" inside the body. For starters, you no longer have a constant gravitational parameter (effectively mu = 0 at r = 0), so you can forget about using vis viva.
  • 0

#22 ItsGneiss

ItsGneiss

    Newbie

  • Members
  • Pip
  • 9 posts

Posted 13 November 2010 - 09:29 PM

Well, it seems to me that one can only fall halfway through the Earth, because then you're falling "out" (or "up"). "Up", "Down" and other directionality is relative in space. :wacko:
  • 0

#23 Akriti

Akriti

    Senior Member

  • Members
  • PipPipPipPip
  • 625 posts
  • Gender:Female
  • Location:Somewhere in this world

Posted 14 November 2010 - 06:57 AM

Spoiler for

  • 0

Value of a Woman :
She came out a man's ribs. Not from his feet, to be walked on, nor from his head, to be superior over, but from his side to be equal..........
Under the arm to be 'protected', and next to the heart to be 'loved'. <3

Brushes flowing free
Tender strokes of careful love
Painting one's true heart -- Framm





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users