Wednesday, Nov 17, 2010

Go over Problems 3,8,9,14,24 from Applying Newton's Laws worksheet.
It is important to follow the problem solving strategy, draw the free-body diagram, from the free-body diagram write Newton's second law, and then do the math.

Force plate demo: Ask students to predict what the Force vs Time graph would look like for someone jumping up into the air. Sketch predictions on whiteboard.

Do demo - discuss.

Go over elevator problems on whiteboard.

Do football problem with angles. Show that applying upward as well as forward force decreases normal force and allow the player to knock the other over more easily. Showed graph of acceleration vs angle for various coefficients of friction.

Applications of Newton's Laws Worksheet. Work problems 2,4.

Assigned 42, 43, 44, 45, 48 on back side for tomorrow.

Last day to hand in CD 6 is Friday.

Students were having lots of problems with the problem solving strategy for Newton's Laws. I think I will postpone the test until next week instead of Friday.