Physics 101- Introduction to Mechanics
|February 18- Applications of Newton's Laws|
forces- see chapter 46 of our text (the portion on reserve) for
more details (also, the Particle
Adventure on the web is excellent)
There are only four forces- all of our categories (tension, friction, etc) are examples of these four. In fact, most are simply electromagnetic force- force between electrons and atoms.
There are six kinds of quarks (six flavors) up, down, strange, charm, truth and beauty. (great, huh?). Each of these can come in either red, blue or yellow (or anti-red, anti-blue, and anti-yellow). Much like charge provides us with rules on how electricity behaves, color does the same for the strong force.
Quantum chromodynamics is the theory of the strong interaction. Like charge, color is conserved in interactions. Also, particles are color neutral.
Oh, yeah, the messenger particles that help to hold the quarks together? Theyíre called gulons.
The weak force is felt by electrons (and similar
particles) and neutrinos. These are just absolutely fun guys.
They have nearly no mass, and hardly interact with anything (thus the name
weak!). You have thousands of them passing through your body right
now due to the nuclear reactions in the sun.
All of this is known as the standard model among
physicists. There is much experimental data to support it.
So far nothing disproves it.
About the Course
Homework- assignments & solutions
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