PHYS 172H Modern Mechanics Fall 2012
www.physics.purdue.edu/academic_programs/courses/phys172H/
To do AS SOON AS POSSIBLE:
0. There will be very little paper handed out, everything you need to know is on the
above website. You are responsible for reading
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 08
Wednesday, Sept. 21st
RECAP : STATIC Problem
System:
mass,
Surrounding: Earth, Strings
Start with Momentum Principle:
In component form:
Y-component:
Solve for
X-component:
Solve for
2
Another Example
Con
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 01
Monday, Aug 22nd
INTRODUCTION
Instructor: Dr. Carina Rebello
Email: rebelloc@purdue.edu
Office: 245 Physics Bldg.
Office Hours : By Appointment
Please feel free to email me to make an
appointment to meet wi
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 07
Monday, Sept. 19th
1
RECAP: Momentum Principle
Given : All forces acting
on a system due to
surroundings.
Find : Change in momentum of system.
From All Given Forces Find Net Force,
Choose appropriate ti
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 10
Wednesday, Sept. 28th
RECAP : Energy Principle
Change in Energy of a system is equal to the
Work Done on it by the surroundings
Other Inputs
Effect :
Cause :
)
)
(If )
(If is constant)
2
IDENTITY CHANGE
Wh
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 02
Wednesday, Aug 24th
From Last Lecture
An indicator of an interaction can include
Change in speed and/or direction
It can also include (which we will learn more about later)
Change in temperature
Change
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 09
Monday, Sept. 26th
ENERGY
Energy of a system is its capacity to do Work
Change in Energy of a system is equal to the
Work Done on it by the surroundings
Effect
Cause
Unit of Energy and Work is Joules (J)
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 12
Wednesday, October 5th
RECAP : SPRING POTENTIAL ENERGY
Spring Force
Fixed Atom
Spring Potential
Energy
Moving Atom
2
Multi-Particle
Approximation
Point Particle
Approximation
ENERGY OF A MULTIPARTICLE SYSTE
DO NOT OPEN YOUR EXAM UNTIL TOLD
Exam 3, Phys 172, Fall 2010
EXAM # 01
1. Record your twodigit exam version number on scantron form in the
field Test/Quiz number. Please do not omit leading zer
PHYS 172 Fall 2010 Exam 3 Handwritten Portion
(30 points total)
Write down your recitation
time:
Name (Print):
_
Signature:
_
Day (either Wed, Th, Fri):
PUID:
_
Time:
You will lose points if y
PHYS 172H: Modern Mechanics
Fall 2016
Lecture 06
Wednesday, Sept. 14th
RECAP : Real Solids
Solid:
Balls (nuclei), connected by
Spring (chemical bond)
Finding Bond Length:
Start with
Density:
Molecular Mass:
Find # of Atoms per cm3 :
Find Volume (