Go to: Course homepage, Lectures

Informal sessions:

o Tu 3:30-4:20pm, RAS 218; Fri 4-4:50pm, ECJ 1.204.

Lecture 21: Systems of particles

• Motion of one body and extended one-body system
• Newton’s 2^nd law revisit.
• Momentum of a two body system.
• Center of mass: Effective one-body with M and v_cm (or P_cm)

o Two-body system

o Many-body system

• Determine the cm of a body: Examples

o Method of division and recombination

Reminders:

• Midterm 2 tonight. 7pm (be there by 6:50pm). JAS A121A.
• Midterm 2:
• Chapters 5-9 and hw4-7 (unit #2).
• Review unit 1 course summary, especially motion with constant acceleration.
• Also pay attention to today’s lecture.
• Read Advice on taking an exam. This link is also on our homepage.