Work and energy
Physics
Forum reference:
Book page:
http://course-notes.org/Physics
Gravity
10-6-99
Sections 5.6 - 5.10
More circular motion
10-1-99
Sections 5.3 - 5.5
Uniform circular motion
9-29-99
Sections 5.1 - 5.2
Uniform circular motion
When an object is experiencing uniform circular motion, it is traveling in a circular path at a constant speed. If r is the radius of the path, and we define the period, T, as the time it takes to make a complete circle, then the speed is given by the circumference over the period. A similar equation relates the magnitude of the acceleration to the speed:
Friction
9-24-99
Sections 4.8 - 4.9
The force of friction
The normal force is one component of the contact force between two objects, acting perpendicular to their interface. The frictional force is the other component; it is in a direction parallel to the plane of the interface between objects. Friction always acts to oppose any relative motion between surfaces.
Introduction
9-3-99
Sections 1.1 - 1.8 and Appendix A
If you were taking a trip to Greece, you'd get the most out of your
trip if you learned some Greek before going. Knowing a little of the
language would help you somewhat; being fluent in the language would
help you immensely. The same holds true for physics.This introduction
to physics is simply a review of the language of physics. If you're
unfamiliar with some of these concepts, spending the time to become
fluent will help you immensely in the course. Practice makes perfect!
Energy and Momentum
Assorted forces, and applying Newton's laws
9-22-99
Sections 4.6 - 4.7
Forces can come from various sources. Whenever two objects are touching, they usually exert forces on each other, Newton's third law reminding us that the forces are equal and opposite. Two objects do not have to be in contact to exert forces on each other, however. The force of gravity, for instance, is a good example of a force that can arise without two objects being in contact with each other.
Newton's laws of motion
9-20-99
Sections 4.1 - 4.5
Force
We've introduced the concept of projectile motion, and talked about throwing a ball off a cliff, analyzing the motion as it traveled through the air. But, how did the ball get its initial velocity in the first place? When it hit the ground, what made it eventually come to a stop? To give the ball the initial velocity, we threw it, so we applied a force to the ball. When it hit the ground, more forces came into play to bring the ball to a stop.
Forces and Newton's Laws
Pages
Need Help?
We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.
For general help, questions, and suggestions, try our dedicated support forums.
If you need to contact the Course-Notes.Org web experience team, please use our contact form.
Need Notes?
While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!
