Wednesday, November 5, 2008 - Blocks 1 and 3

Collected Air Resistance Labs.

Handed out worksheet with friction problems with both static and kinetic coefficients of friction. Students worked on the problems and then I went over them in class.

Described the microscopic causes of friction.

Showed problem with non-horizontal force (force acting upwards at some angle to the horizontal) and showed how this decreased the normal force and thus decreasing the friction force. Related this to blocking in football.

Reviewed topics for test.

Put out extra worksheets for interested students to try at home.