2007-09-10

Today's nonsense
- Homework due
- Cheezits
- Test on Thursday/Friday.
- Test review tomorrow.
- Homework due tomorrow.
-

There will be past homework problems on the physics test, so make sure you study the problems that most people got wrong (like the #12 problem that was 66 + 1/3 or something.).

Before we get started to the one-page homework due tomorrow, we're going to get back to the perfume rocket problem. The magnitude of velocity is speed.

#86 - Two balls are thrown into the air at a bus stop. The first ball has a velocity of 24 m/s and the second perfume ball has a velocity of 14 m/s. The perfume ball collides with the other ball when the perfume ball is at the highest point. In order to solve this you take the derivative of the position function for the perfume ball and then set the velocity function (the derivative) to zero in order to find the time. This problem will probably be on the test. (#86). There's also a problem where it says that "in the last second the ball traveled X seconds."