Has the first law of thermo dynamics been broken?

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SUMMARY

The discussion centers on the first law of thermodynamics and its application to a falling rock reaching terminal velocity. It establishes that while gravitational potential energy (G.P.E.) decreases, kinetic energy (K.E.) remains constant, leading to questions about energy loss. Participants conclude that energy is not lost but converted into sound energy and heat energy due to air resistance. The conversation emphasizes that the first law of thermodynamics remains intact, as energy transformation occurs rather than loss.

PREREQUISITES
  • Understanding of gravitational potential energy (G.P.E.)
  • Knowledge of kinetic energy (K.E.) calculations
  • Familiarity with the concept of terminal velocity
  • Basic principles of energy transformation in physics
NEXT STEPS
  • Research energy transformation in fluid dynamics
  • Explore the effects of air resistance on falling objects
  • Study the thermal dynamics of spacecraft during atmospheric re-entry
  • Learn about sound energy generation in mechanical systems
USEFUL FOR

Students of physics, educators teaching thermodynamics, and engineers interested in energy systems will benefit from this discussion.

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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