Physics Help Forum The increase in speed and increasing the acceleration of reactor power of the spacecr
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 Jul 13th 2009, 05:06 AM #1 Junior Member   Join Date: Jul 2009 Posts: 2 The increase in speed and increasing the acceleration of reactor power of the spacecr To download Author : Mohammadreza Tabatabaei Source : http://ki2100.com/english/index.php?option=com_content&view=article&id=47:th e-increase-in-speed-and-increasing-the-acceleration-of-reactor-power-of-the-spacecraft-is&catid=35:relativity&Itemid=54
 Jul 13th 2009, 05:38 AM #2 Physics Team   Join Date: Feb 2009 Posts: 1,425 Thanks for the link. But can you use the eqns of special relativity along with acceleration?
 Jul 15th 2009, 06:47 AM #3 Physics Team   Join Date: Apr 2009 Location: Boston's North Shore Posts: 1,573 That paper has an error in it. The expression F = ma is incorrect if the force is in the same direction the body is moving. E.g. if you have a body moving in the +x direction then $\displaystyle F_x = \gamma^3m_0a_x$ The derivation of this expression is here Longitudinal and Transverse Mass What you have in your paper is $\displaystyle F_x = \gamma m_0a_x$ which is wrong. I can read more if you'd like but what you've been trying to calculate has already been rigorously been done. See http://en.wikipedia.org/wiki/Relativistic_rocket Even if a rocket has constant acceleration in its own frame of reference it will never reach the speed of light. That calculation is also well known. See http://www.geocities.com/physics_wor...form_accel.htm Uniform acceleration occurs when a charged particle is placed in a uniform electric field. In the particle's rest frame the force is a constant so the acceleration is uniform. Such a particle can never reach the speed of light. Last edited by Pmb; Jul 15th 2009 at 07:06 AM.

 Tags acceleration, increase, increasing, power, reactor, spacecr, speed

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