Physics 131 9/10/12 Prof. E. F. Redish 1 9/10/12 1 Physics 131 Theme Music: Elton John Rocket Man Cartoon: Bill Waterson Calvin & Hobbes September 10, 2012 Physics 131 Prof. E. F. Redish From Ezra Klein’s “Wonkblog” 9/10/12 2 Physics 131 Which graph shows the biggest percentage change from 1/08 to 8/12? 1 2 3
6
Embed
Theme Music: Elton John Rocket Man - UMD Physics · Physics 131 9/10/12 Prof. E. F. Redish 2 9/10/12 Physics 131 3 Foothold ideas: Velocity Average velocity is defined by Instantaneous
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Physics 131 9/10/12
Prof. E. F. Redish 1
9/10/12 1 Physics 131
Theme Music: Elton John Rocket Man
Cartoon: Bill Waterson Calvin & Hobbes
September 10, 2012 Physics 131 Prof. E. F. Redish
From Ezra Klein’s “Wonkblog”
9/10/12 2 Physics 131
Which graph shows the biggest percentage change from 1/08 to 8/12?
1
2
3
Physics 131 9/10/12
Prof. E. F. Redish 2
9/10/12 3 Physics 131
Foothold ideas: Velocity
Average velocity is defined by
Instantaneous velocity is what we get when we consider a very small time interval (compared to times we care about)
!v = !!r!t
= vector displacementtime it took to do it
dtrdv!
! =
Note: an average velocity goes with a time interval.
Note: an instantaneous velocity goes with a specific time.
Multiple Representations We choose different ways of representing
things depending on what we want to do.
Adding multiple sensory modes adds to our sense of an object’s reality.