Test corrections are due at the beginning of class on Friday- NO EXCEPTIONS.

- To earn points, explanations of what was wrong (with the correct solution) need to be provided.
- If you scored lower than 70%, you must discuss the test with me to earn the points. Others are more than welcome to talk with me about the test, but aren’t required.
- You can earn up 25% of your missed points.

On Friday we will take the diagnostic
quiz which we did at the beginning of the semester. For every question you get
right on that quiz, I will add a point to your final score. This is meant not
only to help you earn some points, but also encourage you to avoid last minute
cramming for the final. The quiz covers most of what we’ve discussed this
semester- kinematics, forces, Newton’s Laws, conservation of momentum,
etc.

Bernie will have office hours on
Monday 11- 1.

Dr. Jeff will have office hours on Wednesday 1- 3:30, Thursday 9- 11 & 2- 4, Monday 1- 3, Tuesday 10- 2.

This is our grand finale of the semester.
Here we combine nearly everything we have studied- Newton’s Laws, circular
motion, conservation laws and gravity. With all of these tools we can now explain
the motion of the planets and other astronomical bodies. No small feat!

Some advice as you prepare for the final...

In the energy unit, you knew that there was a pretty good chance that you would have to use energy to solve a problem. But, on the final and in the rotation unit, it isn’t always obvious which concepts to use. You have to check which concepts are applicable before working out any math. My advice for everybody as you prepare for the final is to think carefully about the assumptions or conditions behind the various concepts and equations. For example-

- When can we use the idea of conservation of mechanical energy? Only when there aren’t any nonconservative forces, and when there are no external forces (sources of energy).
- If we have a disc that is rotating
do we always use I=1/2 MR
^{2}? No, this is valid only when the disk is spinning about its own central axis. Any other axis and we must sue a different expression for the moment of inertia.

By understanding the conditions which form the foundation of the concepts, you will be in a better position to know which concepts and equations to use on a problem. After all, it is this first step, identifying the fundamental physics concepts, that is probably the most difficult. This is why I’ve been pressing all of you to express the concepts behind each problem you’ve encountered. There is a reason for this part of the problem solving algorithm!