# The Naked Scientists Forum

### Author Topic: How can we accelerate in space  (Read 1501 times)

#### The Champ

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• Posts: 3
##### How can we accelerate in space
« 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?

#### Murchie85

• Sr. Member
• Posts: 124
##### How can we accelerate in space
« Reply #1 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.

#### tommya300

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• Posts: 655
##### How can we accelerate in space
« Reply #2 on: 21/09/2010 21:33:47 »
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

#### yor_on

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##### How can we accelerate in space
« Reply #3 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 ::))
« Last Edit: 22/09/2010 10:02:14 by yor_on »

#### The Naked Scientists Forum

##### How can we accelerate in space
« Reply #3 on: 22/09/2010 10:00:42 »