Conservation of kinetic energy in expanding space
Jul 31, 2025 · Knowledge of kinetic energy and its dependence on reference frames. Basic concepts of the cosmic microwave background radiation and redshift/blueshift phenomena. Explore the …
Why is kinetic energy 1/2 mv^2? - Physics Forums
May 12, 2013 · This is probably a stupid question because the answer is likely "it just is". I am reading Calculus: The elements by Michael Comenetz, and when talking about mQ, he goes on to say "there …
Escape Velocity Question: Why is the final kinetic energy = 0?
Dec 13, 2020 · So Ekf-Eki+Epf-Epi=0. I understand that the final potential energy is 0 (distance away approaches infinity), but don't get why the final kinetic energy becomes 0. If the final kinetic energy …
Kinetic Energy of 3D Fermi Gas at Absolute Zero - Physics Forums
Nov 16, 2010 · Show that the kinectic energy of a three-dimensional fermi gas of N free electrons at absolute zero is (Mathematica code used) u = 3/5 N...
How is momentum conserved if you lose kinetic energy?
Dec 18, 2018 · The energy component of KE is the velocity. Momentum is mass x velocity so, in a collision containing in-elasticity, if KE is lost to heat then that heat energy must have been supplied …
Why Does Doubling Velocity Increase Kinetic Energy by Four Times?
Dec 16, 2004 · After about 3 years of learning physics, I still can't understand how the kinetic energy formula works. If the velocity of an object is doubled, why does...
Can anybody explain the formula for Kinetic Energy?
Jun 16, 2007 · I have always plugged numbers into the following forumula: KE = 1/2m*v^2 and it works perfectly. :biggrin: I don't understand why. :blushing: Can anybody please tell me why it is one half …
Solved Part A - The energetics of tsunamis There is an - Chegg
Jan 1, 2026 · The total energy of a wave is the sum of its kinetic and potential energies: Total energy Kinetic energy + Potential energy Kinetic energy is the energy of motion and increases with the …
Kinetic Energy of a Cylinder Rolling Without Slipping
May 6, 2023 · Given that there is a cylinder rolling without slipping down an incline, the method I was taught to represent the KE of the cylinder was: ##KE_ {total} =...
Change in Potential energy equals change in Kinetic energy?
Aug 4, 2017 · Homework Statement I'm trying to digest the concept of change in potential energy being set equal to a change in kinetic energy. Does this relationship...