Physics 213 Discussion # 20 Wednesday 10-3-2007

0. Announcements.

Maverick Movie week. This week’s movie is “ An Inconenient Truth”

Movie Times: Wed 2:45 - 4:45, Th 3 - 5, Fri 7-9 AM

For Exp 8: What measurements must be taken in order to determine how many rotations or degrees each wheel must turn in order to complete the circular track?

Hint: You must also lower the power for the inside wheel in order for it to go in a circle..

Hwk 12 due Today.

1. Today's OTQ is Q20 = 7a

2. Discuss today’s Def’s.

3. Do Wkb Chapter 8

M 10-1

CM & Rotational Mot I S&J Chap 10 D13: 9-10 to 10-7 wkb chap 8 Q19 = 10b

Hwk #11 Chap 9 P 15,17,19,20, ans .556 m, 24, ans vb=2√gl, v =(4M/m)√gl , 25

Up next: Test 2 & Rotational Motion II

W 10-3

Test 2 & Rotational Mot II D14: 10-8 to 10-11 Q20 = 7a

Hwk #12 Chap 9: 41, 44B Chap 10 P3,5,7,13,17