Advanced Physics I (AP-C)
updated:  09/01/07 08:42 PM
Week of 8/28/07 Syllabus Course Expectations Safety, Honesty, & Lateness Policy Next week Last week

Your first set of AP Problems are due by 6:00 pm on Tuesday, 8/28
  Due Time Monday  Tuesday Wednesday Thursday Friday
class    look at the energies in the both the horizontal and vertical spring applets....

what's the difference?

 horizontal spring applet

vertical spring applet

 

 vertical spring applet link now fixed

(see yesterday's questions)

 

we re-did 16(8) as a vertical spring, and showed that the conservation of energy equation holds:

1/2 kA2 = 1/2 mveq2

just like for a horizontal spring

   we showed that the maximum net force on the mass attached to a vertical spring is kA
(just like for a horizontal spring)

and that it occurs at the extreme points in the oscillation
(just like for a horizontal spring)

we talked about how we knew that the equation

x = xmax cos(wt + f)
holds for a horizontal spring

but NOT for a vertical spring
(so what does?)

 we did practice problems on 1-D motion in class in pairs:

Q 2(6,8)

P 2(3,4,5,7,8,10)
reading
 		 before
class,

except on Wednesday

 16(5,7)   finish reading chapter 16   back to basics:

chapter 2(1-4)
 
homework 8 AM          
class  problem 16(8) to present in class

finish up part a of problem 16(28) that we were doing in class Friday


(also bring last Friday's homework on the conditions for equal, which I forgot to deal with)

 the document camera now works, so we can present 16(8) today

also, finish the "part c" that we added at the end of class yesterday....

no numbers, just reduce the conservation of energy equation (to two terms? one on each side)...

(did you catch the mistake i made in class yesterday?  i labeled xeq and xes from the top of the incline & i should have labeled it from the relaxed state)

   problem 16(8) as a vertical spring:

where is the net force the greatest?  top? bottom? both?

and how much is it?

 

problem 16(36) for class presentation

  
6 pm   turn in
AP prob set 1		      
lab 8 AM          
class       bring a hard copy of your final pendulum proposal to lab today

we finally DO the pendulum lab... you can ask me for materials before today, though

  
6 pm look at my comments on your pendulum proposal   revisions to pendulum lab proposal due to moodle    
other 8 AM