EES 0836 Lecture Notes - Lecture 26: Perpetual Motion, Nuclear Fission, Drive Shaft
3 Apr 2016
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Lecture - 26: the flow of energy, (cid:1)(cid:2)(cid:3)(cid:4)(cid:3)(cid:5)(cid:6)(cid:7)(cid:5)(cid:8)(cid:9)(cid:10)(cid:3)(cid:11)(cid:5)(cid:12)(cid:4)(cid:9)(cid:10)(cid:13)(cid:5)(cid:14)(cid:2)(cid:3)(cid:4)(cid:3)(cid:5)(cid:6)(cid:7)(cid:5)(cid:15)(cid:9)(cid:3)(cid:11, energy as a tool in physics, energy is a very abstract notion, but it is a very useful and quantifiable notion, we use the conservation of energy to predict behavior. By setting e = mgh + mv2 = constant we can elucidate the value of the velocity at any height: v2 = 2g(height fallen from rest) Most of what we use derives from the sun. Some derives from other, exploded stars (nuclear fission) Air resistance: must push through air with a force (through a distance) (cid:23) work is done. Gets some air swirling: puts kinetic energy into air (not really fair to separate these last two: perpetual motion means no loss of energy. Solar system orbits come very close: some energy chains, a toilet bowl with some gravitational potential energy is dropped, potential energy turns into kinetic energy, kinetic energy of the toilet bowl goes into:
