e154 pages updated: 04/13/2018

Current Announcements   04/13/18
HW ASSIGNMENTS
Updated 04/13/18
Date
Subject
Remark
4/20
HW#11,12

HW #11: Prob #54 eliminated from assignment

4/13
HW#11,12

HW #11, 12 due dates updated.

4/13
Week #13

M 4/23: Ch5 Rigid Body Rotation
W 4/25: Ch5 Rigid Body Rotation

4/13
Week #14
Tentative

M 4/30: Ch5 Rigid Body Rotation
W 5/02: Ch6 Planar Kinetics

4/13
Week #15
Tentative

M 5/07: Ch6 Planar Kinetics
W 5/09: Exam #3

4/13
Week #16
Tentative

M 5/14: Ch6 Planar Kinetics
W 5/16: Ch6 Planar Kinetics; Review

4/13
FINAL EXAM

M 5/21: 2pm - 4pm, M-439

03/17

Work-Energy
YouTube
Videos

Work Done by a Force
  Work Done by a Force (Yiheng Wang, Lecture 15, ~10 min., 2013)
    including Work by an object's weight, and by a spring.

 Work done ON spring:
    W
= -+ (1/2)k[ (xf )2 - (xi )2 ]

 Work done BY spring:
    Ws = - (1/2)k[ (xf )2 - (xi )2 ] = (1/2)k[ (xi )2 - (xf )2 ]


03/17

Work-Energy
YouTube
Videos

Derivation of Work-Energy Theorem (in 1-D, constant force).
 Work-Energy Theorem (Flipping Physics, ~ 8 min.)

Consider a force being applied to a moving object. The object moves in the tangential direction (path direction) by an amount ds in time dt. The work done by the force is the product of the force component in the tangential direction and ds: dW = Ft ds (which is the dot product of vector-F and vector-dr. But Ft ds = mat ds = mvdv.
If you integrate dW = mvdv, you get W = delta(Kinetic Energy).
During a period of time, the Work done by all forces on an object equals the change in Kinetic Energy of the object.

03/17

Work-Energy
YouTube
Videos

Work-Energy Theorem
  Basic idea (Brightstorm, < 3 min.)

  Two 1-D examples (The Org. Chemistry Tutor, ~14 minutes, 2017)

03/12
YouTube Videos

General 2D impulse-momentum example
     2-D Impulse-Momentum (Structurefree, ~8 min.)

Impact (with coefficient of restitution)
     Impact (UWMC Engineering, ~6 minutes)
     2D Oblique Impact (Structurefree, ~11 minutes)

3/7

Monday
3/26

NO CLASS

No Class...

OUTSIDE ASSIGNMENT:

  1. Read section 3/6 Work-Energy
  2. Watch Work Done by a Force (Yiheng Wang, Lecture 15, ~10 min., 2013)  including Wrok by an object's weight, and by a spring.
  3. Watch  Derivation of Work-Energy Theorem (Flipping Physics, ~ 8 min.)
  4. Watch a couple of basic problems
      Basic idea (Brightstorm, < 3 min.)
      Two 1-D examples (The Org. Chemistyr Tutor, ~14 minutes, 2017)
  5. Start Work-Energy Homework.
  6. Read section 3/7 Potential Energy
01/19

Outside Assignment
For Monday,
Jan. 22.:

Read Syllabus
Watch Videos
Do Quiz

No class meeting on Monday, 1/22.

Outside Assignment in place of class:
1. Read the syllabus. Know it.
2. Watch the following video
s:

Dr. Yiheng Wang, EGR 245 - Danville Community College:
     Lecture 1 Introduction (~6 min.)
     Lecture 2 Particle Kinematics: Rectilinear motion, Part 1 (~6 min).

AND
Structurefree's less formal video:
     1-D Particle Kinematics Introduction (~10 min.)

3. Complete the following quiz and turn it in at the start of class on Wednesday, 1/24. Quiz #1

Hardcopies of the Syllabus and the Quiz are on the file cabinet outside of my office in M-309.

01/04

HW #1

HW #1 - posted here

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