Talk:Theory

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Revision as of 05:59, 29 May 2015 by 127.0.0.1 (talk)
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Somebody wrote:

_________________

Back-of-the-envelope "Kinetic Energy Debunk"

Given:

[math]f=ma[/math]

and

[math] e=\cfrac{1}{2}mv^2 [/math]

then

[math]a=\cfrac{f}{m}[/math]

So if this device can produce a constant force then it will produce a constant acceleration.

BUT!... because Kinetic Energy is proportional to the SQUARE of velocity, and the energy being put in is constant, then at some time the attained velocity will mean there is more kinetic energy in the device than has been put in to the device. Yay, free energy! _____________________

That's not a debunking theory, it is an energy and acceleration consideration. It fails to take into consideration the 2nd law of thermodynamics, it makes an unwarranted assumption that the acceleration of the device should be constant, and it fails to consider that in many processes like for example a collision against a wall momentum is conserved but kinetic energy is not.

The issue of energy conservation has its own section in this wiki, and it has been better addressed by @frobnicat.