Friday, December 3, 2010
Fri-Day 2
Physics - we did a "work on an incline" problem in two ways, one involving more steps, the other involving fewer steps (the way that we will be doing future problems). We did so because we needed to establish the equivalence of the two methods.
We saw, for an object that has no NET change in its kinetic energy (started at rest, ended at rest, or any lack of net change in velocity) that the WORK on the object is solely equal to its change in GRAVITATIONAL potential energy (due to its change in height/position relative to the center of the Earth). This work is equal to the calculation of force applied to the object along the ramp (F parallel of the Fg/weight component) x the distance along the ramp.
We introduced the next problem that adds the factor that there is friction between the object and the ramp's surface.
We saw, for an object that has no NET change in its kinetic energy (started at rest, ended at rest, or any lack of net change in velocity) that the WORK on the object is solely equal to its change in GRAVITATIONAL potential energy (due to its change in height/position relative to the center of the Earth). This work is equal to the calculation of force applied to the object along the ramp (F parallel of the Fg/weight component) x the distance along the ramp.
We introduced the next problem that adds the factor that there is friction between the object and the ramp's surface.
AP Chem - took the Periodicity exam, using the 3 key factors that explain all of periodicity and, directly or indirectly, explain all of chemistry!
To reinforce the ultra-important Lewis structure-drawing technique, do the worksheet "Lewis structure practice" that is posted on Blackboard. I will collect the hw on Monday in class.
Thank you. Looking forward to reading cogent, logical, and thorough explanations from today's test; it is time that every individual is on board, and improving in all areas. The course is almost halfway through.
# posted by C @ 7:03 AM 
