Thursday, April 2, 2009 - Block 2

Handed back graphical statics quiz and CD 4.2

Collected RA 4.2

Students did analytic statics quiz.
Went over the quiz on the board.

Continued Hewitt 2nd Law video
Asked students why two objects of different weight fall at the same rate. For those students who said the forces were the same, I had them come to the front of the class and hold the bowling ball and tennis ball out in front of them so really show that the forces are not the same.

Re-explained it is the ratio of the force to mass that is the same. This is the second really big thing I want students to know. (The first was the reason why astronauts in the space shuttle appear to be weightless).

Handed out Newton's 2nd Law Problem worksheet. Gave students time in class to work on it. It is due tomorrow.