Warmup Wednesday October 31 2012 Terminal velocity explained

Warmup! Wednesday, October 31, 2012

Terminal velocity explained http: //www. youtube. com/watch? feature=player_ embedded&v=4 qe. Ccvq 2_io

Today's Agenda: • Turn in any papers that were due. After this moment, they will be too late. • • Pass back Test reviews for Chapters 4 & 5 Discuss reviews, be sure you have the correct information. • • • Test tomorrow! (It will NOT be open book) Notebook check tomorrow! Portfolio check on FRIDAY!

Test Review for Ch. 4 • • • 3 points possible. Graded on completeness and effort. I did not correct the papers for you, that is what you must do now. • This was assigned Tuesday and due the same day. If you do not turn them in at this moment they are too late.

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Test review for Ch. 5 • • • 5 points possible. Graded on completeness and effort. I did not correct the papers for you, that is what you must do now. • This was assigned Monday and due the same day. If you haven't turned them in by now, they are too late.

W = mg

Mr. Kipp doesn't like this question, so don't worry about it being on the test. It is too confusing because we didn't cover situations like this in class.

The 490 -N is the weight of the 50 kg mass (w=mg)

You could also label air resistance on this diagram.

Keyword: frictionless (we know it will slide if there is no force of friction holding it back)

Friction Lab • grading: 10 points possible For the data tables, I was looking for correct data trends: • • Force of Static Friction greater than Force of Sliding Friction Properly calculated coefficients of Friction Appropriate units of measure (Note: coefficients to not have units of measure, but Force does. ) Coefficients should be close in value.

- Static force of friction is always higher than sliding. - Divide force of friction by normal force to calculate the coefficient of friction.