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## lec11

by: Usman Qureshi

16

0

1

# lec11

Marketplace > lec11
Usman Qureshi
AASU
GPA 2.8

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lec11
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 16 views.

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Date Created: 11/18/15
3 Last Lecture 3 Friction 3Today 3 Springs 3 Important Concepts 3 The magnitude of the spring force depends linearly on the distance the spring is stretched or compressed 3 The direction of the force is inward at both ends for a stretched spring and outward at both ends for a compressed spring Important Reminders 3 Pset 4 due here tomorrow at 10am 3Next Mastering Physics deadline is next Monday 3 Next lnClass Experiment is next Tuesday 3 Next Pset due next Friday 3Want to make 801 L better Volunteers needed for a student advisory board if you are interested A better course and free food Properties of Spring Force 3The direction is always unambiguous 3 In for stretched spring out for compressed spring 3The magnitude is always unambiguous 3 FkHo 3Two possibilities for confusion 3 Double negative Using Fkx where it doesn t belong 3 Forgetting the unstretched length 60 Summary gt 17 ki i0 F kl l0 3 Don t double negative your spring force 3Think carefully about the geometry Don t forget the unstretched length of the spring 3Two or more springs in parallel have an effective spring constant of ke k1 k2 3Two or more springs in series have an effective 1 1 1 spring constant of ke 39 1 k2

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