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Unformatted text preview: 1 Lecture 16, 3/8/00 Phy1221 Winter 00 1 Course Announcements • Current Assignments: – Team Project (due date extended to Friday, 10 March) – HW 9 : (only one version, due Friday 6:00 PM) • Ch 9, Ques. 2,3,11; Probs. 3,5,13,20,21,37,48 • Final Exam – Thursday, 16 March, 3:30 PM – Location: 300 Richards – Formula sheet will be provided, and posted in advance – Review sessions: most popular times on survey: • Sunday afternoon (2-4pm) • Tues. afternoon (2-4pm) – Practice problems will be posted Lecture 16, 3/8/00 Phy1221 Winter 00 2 Momentum • Common language: once something has momentum , it is hard to stop. • Mathematical definition: • sometimes referred to as “linear momentum” (as opposed to angular) • Units: kg m/s (not the same as Newtons or Joules) • momentum is a vector quantity (like velocity) • Momentum of a system of particles: • momentum is conserved for isolated systems (systems with no external forces acting on them) v m p = momentum of a body = (mass)(velocity) ∑ = i i...
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This note was uploaded on 07/08/2009 for the course PHY 1221 taught by Professor Staff during the Winter '00 term at Northeastern.
- Winter '00