Cuesta College :: Physics 205A :: Fall 2017
Calendar Policies Goals Grades
    *.html

Monday 
"Iteration, like friction, is likely to generate heat instead of progress."
     --George Eliot (as Mary Anne Lewes), The Mill on the Floss, 
       Ward, Lock and Co. (1860), p. 158.

Quiz 3 worksheet questions (*.pdf)

(Ch. 4.3: Newton's Second Law of Motion)
     Ex: net force on elevator (*.blog)
     Ex: comparing magnitudes of forces on elevator (*.blog)
     
Ch. 4.9: Static and Kinetic Friction
     Ex: unsticking a book from rest (*.blog)
     Ex: friction-slowed book (*.blog)
     Ex: speed(?) of pushed box (*.blog)


Laboratory 
Tuesday 
Check Twitter announcements: #CuestaPhys205A
Review previous reading assignment responses (*.blog)

Read Physics, 10/e, Chs. 5.2 (skim), 5.3, 5.7
Preview online presentation (*.blog)
     (Carefully read the definition of "centripetal force" on p. 125--especially with an emphasis that it is not an actual force, but merely a specific name for the net force on an object undergoing the specific case of circular motion, with a specific magnitude (mv2/r), and a specific direction (in towards the center of the circle).)
     
Physics quiz question: kinetic friction force on sliding suitcase (*.blog)
Physics quiz question: pulling on still-stuck crate (*.blog)
Physics quiz question: forces pushing on still-stuck suitcase, crate (*.blog)
Ch. 4 Problems 15, 39, 47(a)

Due 12:00 AM before start of next lecture
     Reading assignment 10 (*.html)
     Homework report 10 (*.html)


Wednesday 
"Pain doesn't travel in straight lines.  It circles back around and comes up behind you.  It's the circles that kill you."
     --Pat Conroy, Beach Music, Doubleday (1995), p. 413.

Midterm 1 worksheet questions (*.pdf)

Chs. 5.2-5.3: Centripetal Acceleration, Centripetal Force
Ch. 5.7: Vertical Circular Motion (*.blog)
     Ex: normal force on truck going over hill (*.blog)
     Ex: free-body diagram of upside-down car at top of loop (*.blog)
         
Quiz 3 announcements
     Monday, 10/2, 11:00-11:25 AM
     Closed-book, closed-notes
     Ten multiple-choice questions
          Vector magnitude/direction/components (three questions)
          Projectile motion (two questions)
          Forces, Newton's laws (five questions)
     No work needs to be shown; no partial credit
     No Scantrons; circle answers directly on quiz
     Bring your scientific calculator
     **USE YOUR OWN UNIQUE 4-DIGIT P.I.N.**


Thursday 
Check Twitter announcements: #CuestaPhys205A
Review previous reading assignment responses (*.blog)

Read Physics, 10/e, Chs. 6.1-6.2
Preview online presentation (*.blog)
     (These are entirely new concepts related to an entirely new approach to analyzing motion not based on Newton's laws.  Note the cause-and-effect relationship: work done on an object increases its kinetic energy; work done against an object decreases its kinetic energy.  Later we'll consider how work affects other types of energy, and how these energy types can affect each other without necessarily involving work.)

Ch. 5 Example 5 (p. 125)
Ch. 5 Problems 19(a)-(b), 41(a)-(b)
Physics midterm question: water-filled bucket twirled in vertical circle (*.blog)
Physics final exam question: truck driving over hill vs. through dip (*.blog)

Due 12:00 AM before start of next lecture
     Reading assignment 11 (*.html)
     Homework report 11 (*.html)