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: http://zebu.uoregon.edu/1999/ph161/l4.html
Дата изменения: Thu Jan 21 19:48:39 1999 Дата индексирования: Mon Oct 1 23:50:08 2012 Кодировка: Поисковые слова: п п п п п п c 1999 s4 linear |
Mechanics: Description of forces and energies associated with moving
objects; a manifestation
of forces acting on material objects
Components of Mechanics:
Real Physics looks like this
Our Version of Physics is more like the following:
1. You can't move a building
2. A train accelerates more slowly than a motorcycle
3. What goes up must come down
4. On the freeway you would rather have a headon collision with
a mosquito instead of a semi
5. You get tired after climbing a long flight of
stairs
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Newton's Three Laws:
What is Energy?
Energy comes in many forms, kinetic, potential (stored), heat, etc. Energy is always conserved. It is not created or destroyed but is just transformed from one form to another.
Energy = FORCE * DISTANCE
Power = Energy/Time
Energy = Power * Time
A kilowatt is a unit of Power
A kilowatt hour is a unit of Energy
Two Main Kinds of Energy
Internet Resources: