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Lecture: 39 Odds and ends in Ch11 (iq36)

1. General case for headon elastic collisions

o Center of mass

o Co-moving with cm. Looking at elastic collision in cm rest frame.

o V*=V-v_cm

o Elastic bounce: p₂’* = -p2*.

o v’₂- v_cm = - (v2-v_cm), or v’₂= 2v_cm –v₂

2. Example: p438-439. Satellite hit by a meteorite.

3. Boy +MGR

4. Example: p439-440. Pulling a stick. Errata: Fig11.50,51 point A is at top.

5. Predicting theta (analogy to momentum principle)

6. Reflections 4 and 5.

7. Link under course summary: Discussions on selected MI-topics (See item 1.)

Announcement:

o There will be no official TA and LA office hours over the Thanksgiving weekend.

o Exam4 will include Sec. 9.4-9.5; Sec. 10.1-10.7; Sec 11.1-11.9. (This supersedes the information on the original syllabus)