Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: The Champ on 21/09/2010 14:52:09

Title: How can we accelerate in space
Post by: The Champ on 21/09/2010 14:52:09

Imagine we are in a space craft which is moving with a constant velocity in empty space. If we are not influenced by any gravitational forces, and if we restart the engine, will it be accelerated ,Why?

Title: How can we accelerate in space
Post by: Murchie85 on 21/09/2010 17:15:56

Well its all down to the potential chemical energy stored within the fuel in the engine (usually combustable) this produces work on its surroundings and results in a directed force and (unbalanced force) which produces an acceleration.

Title: How can we accelerate in space
Post by: tommya300 on 21/09/2010 21:33:47

Quote from: Murchie85 on 21/09/2010 17:15:56

Well its all down to the potential chemical energy stored within the fuel in the engine (usually combustable) this produces work on its surroundings and results in a directed force and (unbalanced force) which produces an acceleration.

F=MA

Title: How can we accelerate in space
Post by: yor_on on 22/09/2010 10:00:42

Nice one, if the rocket is 'uniformly moving' leaving you no way of measuring your possible speed (black box scenario) and you then start that engine, will it accelerate at all times?
No matter its former 'speed', or strength of engine?

Sure.
But it is a nice one.
You tell me, huh ::))