There are three labs in progress at the moment:
1. Catapult: projectile motion and conservation of energy due Friday April 4
2. Pendulum: simple harmonic motion due Monday April 7
3. Radius of gyration: torque, rolling without slipping, conservation of energy Due Monday April 7
Data on labs 2 and 3 should have been collected by Monday March 31.
Based on our classroom discussions, you should have a good idea of how to use the raw data to support your objectives for each lab.
These labs are one way to review these important topics in mechanics.
In addition, we have been using the textbook to review topics listed in my previous post:
there will be quiz Friday April 4 on all topics listed.
There are three labs in progress at the moment:
1. Catapult: projectile motion and conservation of energy due Friday April 4
2. Pendulum: simple harmonic motion due Monday April 7
3. Radius of gyration: torque, rolling without slipping, conservation of energy Due Monday April 7
Data on labs 2 and 3 should have been collected by Monday March 31.
Based on our classroom discussions, you should have a good idea of how to use the raw data to support your objectives for each lab.
These labs are one way to review these important topics in mechanics.
In addition, we have been using the textbook to review topics listed in my previous post:
there will be quiz Friday April 4 on all topics listed.
Terminal velocity lab is due Tuesday
Please go to the 'handouts' folder for additional helpful info on terminal velocity
That document supplements Section 5.5 in our textbook.
Read textbook sections and do the problems for first 3 topics for TUESDAY.
There will be a short 5 in 5 quiz on TUESDAY to check your progress.
List of mechanics topics for the next few weeks:
1) Terminal velocity Ch 5.5, example 15
problems # 58, 59, 60, 90, 91
2) GPE, Escape velocity Ch 8.7, review Sec 1-7 examples 13, 14
Review probs # 21, 24, 27, 32, 35
specific 8.7 problems 39, 43, 45, 48, 53
3) Kepler's Laws, Consv of Angular Momentum Ch 6.5, example 8,
Ch 6 problems # 33, 38, 43;
Ch 11.7 examples 10.14, 11. 6, problems 11.35, 37-40
4) Collision and Impulse, Center of Mass, Rocket Propulsion Ch 9.3, 8-10 examples 13,14,16-18,
problems 71-76, 78, 79
5) Moment of Inertia Ch 10.8 example 10
problems 46-50
We started class by watching a clip of "Einstein's Big Idea' in which James Clerk Maxwell tells Michael Faraday that he was right all along with his hypothesis that light was an electro-magnetic wave. Maxwell's mathematics showed that the speed of light, c, was a crucial part of some of the equations.
To date, we have used three of the four equations in integral form to perform various calculus-based calculations. Here is a link to a synopsis of Maxwell's law. You will recognize this from class.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/maxeq.html
We practiced stating Maxwell's laws in descriptive words rather than restating the equations themselves.
If you click on each equation on the above website, you can read a description of each law and some specific consequences/implications for each law.
Here is an extremely helpful video that explains Maxwell's Laws using dramatic interpretation (like Einstein's Big Idea) and terrific animations of each law.
https://www.youtube.com/watch?v=VdoL8IOwJw0
Here is a link to a well-written article on Maxwell's Laws
http://www.theguardian.com/science/2013/sep/15/maxwells-equations-electrify-world?commentpage=1
Unit test is on Thursday, B day.
Refer to the prior post for 'what's on the next quiz?'
The documents and solutions we reviewed in class today can be found in the 'handout' folder on my main 'advanced topics' webpage. .
Unit test had been postponed to Wed next week, A day.
On Monday, we will start revisiting mechanics with calculus.
Ch 21 section 7 examples 9, 10, 11 E fields revisited: electric fields around continuous charge distributions
Ch 23 sections 2, 3, 4, 7 examples 3, 4, 6, 8, 9,11 Electric potential revisited: relationship between electric fields and electric potential, potential due to any charge distribution
Very much like applying Biot Savart to a current carrying segment (Ch 28.6)
Start with different general relationship and apply calculus to derive specific solution
Ch 22 Gauss’ Law revisited: sections 1, 2, 3 examples 1, 2, 3, 4, 5, 6, 7
Focus on deriving solutions
Quiz Wed March 13
Review these videos on E fields, E potential and Gauss’s Law
Yale prof: Gauss
http://www.youtube.com/watch?v=Hlj5vGOSQlY
Dan Fullerton: Gauss
http://www.youtube.com/watch?v=EojpjIED_qg
random guy: e field
https://www.youtube.com/watch?v=ZPVF57nsdpo
Ms Todd from HSS: e potential
https://www.youtube.com/watch?v=VH7t55LdUzM
Prof Lewin MIT
http://www.youtube.com/watch?v=XaaP1bWFjDA
Unit test on Monday
Topics include previous material from Ch 27, 28, and Ch 29 and all worksheets
I will specifically include 1 Biot Savart and 1 Ampere's law question
Additional material not on previous quizzes includes Ch 29 sections 1-3 because they were not covered on the last quiz: electromagnetic induction according to Faraday's Law, Lenz's Law and motional emf
Dan Fullerton has many helpful videos on these and other topics.
http://aplusphysics.com/courses/ap-c/videos/APCVidIndex.html
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On the topic of inductors (ch 30), we investigated behavior of inductors in an RL circuit using a PhET animation and watched two informative videos on inductors and inductance
animation showing behaviour of an inductor, and oscilloscope demonstrations
http://www.youtube.com/watch?v=NgwXkUt3XxQ
from makezine.com - how to create an inductor, an electromagnet, explanation of behaviour, and oscilloscope demos
http://www.youtube.com/watch?v=STDlCdZnIsw
relevant problems are on back of Ch 29 worksheet
Wednesday's quiz
- biot savart law Ch 28.6
- ampere's law Ch 28.4
- transformers Ch 29.6
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Unit test Monday Mar 3
all previous material from Ch 27, 28, 29 including induction and motional emf
Helpful video on Ampere's Law
http://www.aplusphysics.com/courses/ap-c/videos/APC-Ampere/APC-Ampere.html
On Monday, we reviewed electromagnetic induction, Faraday's law, and Lenz's Law. The relevant powerpoint is included in the 'handouts ' section of my website. Problems from Ch 29 sections 1, 2, and 3 were solved in small group work.
On Wed of this week we discussed the adoption of AC current as the primary type of current distributed to residential and commercial customers and the enabling technologies and scientific innovations that made it possible, specifically Tesla's invention of the AC transformer.
Ch 29.6 discusses transformers and contains example problems; relevant textbook problems are included in worksheets distributed in class.
Biot Savart Law was introduced as a mathematical approach for determining the magnetic field at any point in space around an electric current. Calculus methods of integration and differentiation are required to use Biot Savart Law to determine the exact solution for a particular situation.
We used the following Dan Fullerton video to investigate Biot Savart Law.
http://www.aplusphysics.com/courses/ap-c/videos/APC-BiotSavart/APC-BiotSavart.html
Refer back to the worksheet on Ch 28. Ch28 section 6 discusses Biot Savart. Make sure you understand the derivations in the textbook examples and those worked out in the video. The steps are slightly different between the textbook and video but the final answers are the same.
The rest of this week we will investigate Ampere's Law and parallels to Gauss's Law and Coulomb's Law.
Unit test on Monday 1/27
All of previous material on DC circuits PLUS hand rules
Hand rules questions from problem set taken from Ch 27, 28, and 29
Powerpoints reviewed in class are included under the 'handouts' folder on my main tophy webpage
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