Has the first law of thermo dynamics been broken?

AI Thread Summary
The discussion centers on the implications of a falling rock reaching terminal velocity, where kinetic energy remains constant while gravitational potential energy decreases. Participants question whether this scenario indicates a violation of the first law of thermodynamics or if the energy is simply transformed into sound and heat due to air resistance. The conversation also touches on the extreme heat experienced by the space shuttle during atmospheric re-entry, attributing this to energy loss mechanisms. Ultimately, it is asserted that the first law of thermodynamics remains intact despite these observations. Energy conservation principles are upheld through energy conversion rather than loss.
aeromike
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If :

The total energy of a falling rock = G.P.E. (mass x gravity x height) + K.E. (0.5 x mass velocity^2)

But if a rock reaches terminal velocity (i.e velocity remains the same) but height keep decreasing, then surely Kinetic energy is remaining constant and Gravitational potential energy is decreasing. Where is the loss of energy going?

Has the first law of thermo dynamics been broken? or is it simply converted into sound energy and heat energy due to air resistance? HHmmmmmm
 
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aeromike said:
If :

The total energy of a falling rock = G.P.E. (mass x gravity x height) + K.E. (0.5 x mass velocity^2)

But if a rock reaches terminal velocity (i.e velocity remains the same) but height keep decreasing, then surely Kinetic energy is remaining constant and Gravitational potential energy is decreasing. Where is the loss of energy going?

Has the first law of thermo dynamics been broken? or is it simply converted into sound energy and heat energy due to air resistance? HHmmmmmm

Why do you think the space shuttle gets VERY HOT when it goes through the upper atmosphere? What do you think is the extra channel for energy loss?

First law of thermodynamics can't be broken by something this obvious!

Zz.
 
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