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## lec18

by: Usman Qureshi

18

0

1

# lec18

Marketplace > lec18
Usman Qureshi
AASU
GPA 2.8

No professor available

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lec18
COURSE
PROF.
No professor available
TYPE
Study Guide
PAGES
1
WORDS
KARMA
50 ?

## Popular in Department

This 1 page Study Guide was uploaded by Usman Qureshi on Wednesday November 18, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 18 views.

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### What is Karma?

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Date Created: 11/18/15
3 Last Lecture 3 Introduction to momentum 3 Today 3 More on momentum 3 Combining momentum and energy 3 Important Concepts 3 Momentum is a vector energy is not 3 Think carefully about internal versus external forces 3 Energy changes due to forces along the motion momentum changes due to external forces acting over a period of time 801 L Fall 2005 1182005 Important Reminders 3 Pset 7 due this Thursday 3 Bring it to class here at 10am or drop it at my office before 630pm 3MasteringPhysics due tonight and then again next Monday 3 No class this Friday 801 L Fall 2005 1182005 Momentum 3Very simple formula 3 2mii7i 3 Note the vector addition 3Momentum of a system is conserved only if 3 No net external forces acting on the system 3 Or study the system only over a very short time span Alan J dt 801 L Fall 2005 1182005 Momentum and Energy 3Some processes can be solved by WorkampEnergy some by momentum some multiprocess problems require both techniques 3 Collisions almost never conserve kinetic energy 3 Collisions that conserve kinetic energy are called elastic 3 Never assume that a collision is elastic unless told so 3WorkampEnergy can be solved for 1 unknown momentum can be used to find 1 unknown per spatial dimension 801 L Fall 2005 1182005

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