3-3-09

Picture: =** Physics Journal Liz Chever- 3/3/09**=

On March 3, 2009, we began our class by passing back papers, such as daily graded questions and our Unit 7 tests that we took previously. We then went over the test in detail and people could ask questions if needed. We also explained the bonus questions on the test as well. When we went into class, we also picked up a few papers to start the next unit, Unit 8, Uniform Circular Motion. We picked up the reading guide, page 2 ("Velocity, Force, and Acceleration in UCM Activities"), page 3 ("Circular and Rotational Motion in Terms Notes & Worksheet") and lastly page 4 ("Questions on Rotational Motion"). As a class, we worked on page 2 to begin this unit. After reading the first half, we made predictions about where and what direction the ball or object leaves for the velocity. We then did a demonstration to illustrate this by having someone swing a ball tied at the end of a string and see what direction it goes and where the hand placement is in the demonstration. A short video clip was shown to give us more of a picture of how this demonstration will look like. The man on the video also used the string and ball, and while we played it in slow motion, we could see that it goes in a straight line in the same velocity and direction with the curve of the circular motion, and the ball was released at the top. We ran out of time at this point, but we will have a test on this unit next Friday, since this is a shorter unit.