Each of the YouTube URLs found below were created by Craig Fletcher for his students at Polytechnic School.
HONORS PHYSICS
zPoly: 0 (every Honors Physics evaluation . . . ever) (cWazyWwabbit) This is a tongue in cheek look at the world of class evaluations for Honors Physics at Polytechnic School in Pasadena, California. No students were harmed in the making of this video.
http://youtu.be/11cCPJMJ_K8
zPoly: 4b (example of graphical vector addition) (cWazyWwabbit) This is an example of graphical vector addition in the context of an airplane that runs into an off-angle headwind.
https://www.youtube.com/watch?v=ZkLj_MEm5EM
zPoly: 4a (graphical vector manipulation) https://www.youtube.com/watch?v=rzj-dz1dODQ (cWazyWwabbit) This video defines scalars and vectors, then shows how vectors can be added and/or subtracted graphically.
zPoly: 3a (graph analysis the mathy way) http://youtu.be/IK5W97fTHp4 (cWazyWwabbit) This is a look at the analysis of graphs from the perspective of mathematics.
zPoly: 3b (graphic analysis using your head) http://youtu.be/PU7Rls3H5JY (cWazyWwabbit) This is about the analysis of a graph without the use of mathematical formulas. (And I apologize for the lousy quality of the graphics--I had an awful time with this video . . . )
zPoly: 3c (coordinate axes)
zPoly: 6 (graphical derivation of kinematic equations) (cWazyWwabbit) This is the derivation of the three primary kinematic equations making use of a linear velocity (constant acceleration) graph.
http://youtu.be/bt5m6B9gZHk
zPoly: 7 (kinematics example—how high is that building?) http://youtu.be/Ev7bhL0VCpw
zPoly: 5a (polar notation presented) https://www.youtube.com/watch?v=Ni2yg9TZtFQ (cWazyWwabbit) This is a presentation of the ideas behind vector polar notation.
zPoly: 5b (unit vector notation presented) https://www.youtube.com/watch?v=HOqkMqi6nMQ (cWazyWwabbit) This is a presentation of the rationale behind the unit vector notation.
zPoly: 8 (N.S.L.’s formal approach on elevator problem) https://www.youtube.com/watch?v=rWX8poiG6D8
zPoly: 13 (N.S.L.’s problem with pulley n twist) https://www.youtube.com/watch?v=YPIFSBjzTx4
zPoly: 11 (N.S.L.’s problem with 2 accelerations) https://www.youtube.com/watch?v=rojdX8zukPg
zPoly: 12 (kinetic friction via a truck n box problem) https://www.youtube.com/watch?v=AN6KwF6RxUQ
zPoly: 13 (defining axes in centripetal force problems--Dominica) https://www.youtube.com/watch?v=0kYTPQUwibE
zPoly: 14 (derivation of v^2/R) http://youtu.be/tl_Yn-JNveQ
zPoly: 15a (derivation of Work/Energy Theorem) https://www.youtube.com/watch?v=dFwZGVGoyIw
zPoly: 15b (example problem for Work/Energy Theorem) https://www.youtube.com/watch?v=xC4OoTE2oec
zPoly: 16a (derivation of near-earth gravitational potential energy) http://youtu.be/mUdWjjpW6EA
zPoly: 17 (derivation of conservation of energy) http://youtu.be/S28Wo7zfje8
zPoly: 19 (cons. of mom example—cannon and spring) https://youtu.be/uKfQhCOW-Eo
zPoly: 20 (block on block w spring) https://youtu.be/_vffPexYS4I
zPoly: 21 (rigid body beam problem--Prater) http://youtu.be/aeXb6xLibGk
zPoly: 22 (rotational machinations) http://youtu.be/9ZpLQ1TWREY
zPoly: 23 (complex rotating beam and Newton’s Second Law) http://youtu.be/om8pQ0j8Hg0
zPoly: 25 (complex N S L ball, pulley and incline problem) http://youtu.be/UOHClCQ1B_4
zPoly: 26 (conservation of energy with rotation—complex beam example--Jose)
https://youtu.be/5rSg5VpSNXQ
zPoly 27 (rotational motion conglomerate)
zPoly: 29 (spring constant and amplitude)
http://youtu.be/xcarUKyCpA8
zPoly: 30 (standing waves and steel bar)
http://youtu.be/gaKaPgv-WGM
zPoly: 33 (an exotic preamble to electric fields--burping)
http://youtu.be/KPR7OlvhpH8
zPoly: 34 (electric fields in generic form)
http://youtu.be/L_j2ya5RjmY
zPoly: 35 (absolute electrical potentials in generic form)
http://youtu.be/Cyplz6afxMQ;
zPoly: 36 (electric field for a point charge)
http://youtu.be/dsI6FmhXTSs
zPoly: 37 (electrical potential for a point charge)
http://youtu.be/yljQLIgxmgA
zPoly: 38 (dc circuit preamble)
http://youtu.be/hALZMnNw2GE
zPoly: 39 (seat of the pants DC circuit analysis)
http://youtu.be/Zj3m77Cj-k8
zPoly: 40 (Kirchoff’s Law)
https://www.youtube.com/watch?v=KmIJMgsvFSI
zPoly: 41 (dielectrics and capacitors)
http://youtu.be/BpbYtwHbwZc
zPoly: 43 (B-fields and current-carrying wires)
https://www.youtube.com/watch?v=0Z2ku_T-0GE
zPoly: 44 (DC motors)
http://youtu.be/31G0HxszqyI (needs cleaning up)
zPoly: 45 (motional EMFs)
https://youtu.be/SK2CraiWk0U
zPoly: 47 (RMS values and AC power)
http://youtu.be/-0k9hyQeBUs
(might need a little cleaning up)
zPoly: 48 (reactance and impedance in RL and RC, AC ckts)
http://youtu.be/1R9Rj--74IQ (sine waves not to scale—180 Hz needs one more cycle—480 Hz needs one less . . . )
zPoly: 50 (mass spectrometer)
https://youtu.be/mnhh0uRvQ2o
A.P. PHYSICS
zPoly: 104 (two car kinematics)
https://youtu.be/scN6Ab0MkDM
zPoly: 107 (bolt and elevator kinematics)
https://youtu.be/SLPxqnXpAkQ
zPoly 102 (formatting for a derivation)
https://youtu.be/JYISagPqtKk
zPoly: 109 (Fletch sliding)
https://youtu.be/AadJCX1f8qo
COSMOLOGY, ASTRONOMY AND RELATIVITY
zPoly: 300 (relativity and time measured in meters)
https://youtu.be/6uL1Vh4Y0Jc
DISTANT LEARNING VIDEOS 3/2020
zPoly: 600 dL (preamble to Faraday’s Law)
https://youtu.be/ZydmJ_Asysc
This is a “distant learning” video that shows how a coil and galvanometer circuit acts when the coil is removed and/or inserted into a magnetic field. This is the preamble to the class’s Faraday’s Law (Induction) lectures.
zPoly 605 sc (Magnetic Flux and Faraday’s Law) . . . for AP folks
https://youtu.be/iOlQRk7VlgI
This is a “distant learning” video that discusses the idea of magnetic flux, then goes on to define and discuss Faraday’s Law.
zPoly 606 sc (Faraday’s Law) . . . for Honors
https://youtu.be/SrXeXs9Zr10
This is a “distant learning” video that discusses Faraday’s Law.
zPoly 608 sc (Lenz’s Law)
https://youtu.be/THlcO8oSgMA
This is a “distant learning” video that discusses Lenz’s Law, or “how you determine the direction of the induced current in a coil when the coil experiences a changing magnetic flux through its face.”
zPoly: 610 dL (AC generation and Lenz’s Law)
https://youtu.be/r_CjTLQhYWY
This is a “distant learning” video that shows (and explains) a coil moving in and out of a magnetic field creating an AC current, as observed with a galvanometer. The video then asks the student to use Lenz’s Law to determine the polarity of the leads of the coil as it rotates through quarter cycles in a fixed magnetic field (hence “seeing” the AC generated). The video concludes with a sad excuse for a joke, then a brief description of how a rotating coil in a B-fld generates AC at power plants.
zPoly: 615 sc (magnetic induction and induced electric fields)
https://youtu.be/LEWah_51J5M
This is a “distant learning” video that talks about the electric fields generated by magnetic induction.
zPoly: 620 dL (magnet drop in Aluminum tube)
https://youtu.be/I-72Ct9ohzQ
This is a “distant learning” video that shows (with explanation) the retarding of motion of a magnet dropping through an aluminum pipe.
zPoly: 630 dL (eddy current brake)
https://youtu.be/oS5nDMMTQkM
This is a “distant learning” video that shows an Aluminum disk in free rotation being brought to an abrupt stop by the impinging of a magnetic field.
zPoly 635 sc (eddy current—the theory)
https://youtu.be/ayaYc_iJc6s
This is a “distant learning” video that explains the theoretical and conceptual how and why of the eddy current brake.
zPoly: 640 dL (LED blips n coils around plastic tube)
https://youtu.be/NGMl1LKLS68
This is a “distant learning” video that uses LEDs to show (with explanation) the induced current generated in several mini coils wrapped (at intervals) around a long, plastic tube through which falls a neodymium magnet.
zPoly: 650 dL (ramp problem demo)
https://youtu.be/kTQLEv8U_yI
This is a “distant learning” video that shows two problems. The first has to do with a metal rod in a magnetic field attempting to roll down an incline made up of two knife-edge ramps that are connected to a battery. The second; if the magnetic field is supplied by a horseshoe magnet, how does the rod act as it enters the B-fld even when the battery is disconnected.
zPoly: 660 dL (side by side magnets and eddy currents)
https://youtu.be/lG2qRUd3P-Q
This is a “distant learning” video showing the idea of eddy currents by viewing a thin strip of aluminum foil dropping between two fixed magnets.
zPoly: 670 dL (transformers demo)
https://youtu.be/WgK0hP2jBSo
This is a “distant learning” video that shows a transformer in action, demonstrating how two electrically isolated coils with a common central axis act when current is increased or decreased in the primary coil.
zPoly: 675 sc (transformers—the theory)
https://youtu.be/K98o4JV6MUE
This is a “distant learning” video that describes the theory behind transformers. It additionally speaks to the significance of 120 volts from a wall socket (what does the 120 volts actually tell you) and a brief reflection on Edison and Tesla’s “current wars.”
zPoly: 680 dL (lab—rail gun)
https://youtu.be/EuYpGEmWIBI
This is a “distant learning” video that provides all the information required to do the “rail gun” lab.
zPoly: 690 sc (inductors and inductance)
https://youtu.be/N8FwydYb3Hw
This is a distance learning video devoted to coils (inductors) in DC electrical circuits.
The letters “sc” stand for “screencastify,” the program used to create the video
zPoly: 700 sc (Island Series for Faraday’s Law)
https://youtu.be/0KQvwNckOwk
This is a distant learning video devoted to the Island Series: You have been marooned on a desert island by a kindly but nevertheless slightly crazed physics nerd. You have 24 hours to figure out a problem you have been given. If you succeed, you get to leave. If not, it's home sweet home for the rest of your days (kind of a Survivor meets Lost meets Gilligan's Island). This problem is wrapped around Magnetic Induction and Faraday's Law.
zPoly: 710 sc (magnetic flux)
https://youtu.be/L2BuTKR2JtY
This is a distant learning video devoted to Magnetic Flux
zPoly: 800 dL (oscilloscope workings)
https://youtu.be/jHj7Y8D1EYw
This is a distant learning video devoted to explaining how a dual-trace oscilloscope works.
zPoly: 810 dL (AC current viewed--demo)
https://youtu.be/6IjgRvOydjg
This is a distant learning video devoted to letting students see alternating current at low frequency (.5 Hz through 60 Hz) drive a tiny light bulb and speaker in series.
zPoly: 815 dL (vacuum tubes, semiconductors and diodes)
https://youtu.be/qQhcxz6_vNs
This is a distant learning video devoted to talking about vacuum tubes, semiconductors and diodes.
zPoly: 818 dL (transistors)
https://youtu.be/v8xcXSe0ayo
This is a distant learning video devoted to talking about transistors.
zPoly: 823 dL (RL frequency response--lab part 1)
https://youtu.be/ApLz_Nlr6E8
This is a distant learning video devoted to providing data required to determine the frequency response to an RL circuit in an AC setting.
zPoly: 825 dL (RC frequency response--lab part 2)
https://youtu.be/DQy68-Q-yqk
This is a distant learning video devoted to providing data required to determine the frequency response to an RC circuit in an AC setting.
zPoly: 835 dL (RL and RC circuits)
https://youtu.be/MqYn0YJGLWs
This is a distant learning video designed to explain both how inductors and capacitors work in an AC setting, but also how the math models the action.
zPoly: 840 dL (RC circuit LAB data)
https://youtu.be/8xX07fCW1D4
This is a distant learning video in which an RL circuit in an AC setting is set up, then data is taken to see if the idea of impedance and capacitive reactance really holds water.
zPoly: 850 dL (RLC circuit and impedance)
https://youtu.be/cbK3evGKSh8
This is a distant learning video devoted to the derivation of impedance in an RLC circuits in an AC setting.
zPoly: 860 dL (RLC resonance data)
https://youtu.be/MATav88fEbw
This is a distant learning video that presents data for the frequency response of an RLC circuit as it passes through its resonance frequency.
zPoly: 870 dL (radio through tuner circuit)
https://youtu.be/_bVbCgvUKSg
This is a distant learning video that begins at the radio station and goes through a radio's tuner circuit. The rest of the topics--how information is put onto the single-frequency wave, how the information is extracted by the radio proper, and how a signal might be amplified, will come in the next video.
zPoly: 871 dL (variable capacitors revealed)
https://youtu.be/XSEqyVidV8M
This is a short distance learning video that presents variable capacitors from Geppetto’s workshop (i.e., my storage area, as dubbed by my students).
zPoly: 872 (radio antenna to antenna power transfer)
https://youtu.be/hc9-bNDdGLk
This is a distance learning short video that presents a low intensity, short wave radio frequency transmitter interacts with an antenna attached to a lightbulb.
zPoly: 880 dL (radio: amplitude modulation, speaker circuit and amplification)
https://youtu.be/f143tPIyGq8
This is a distant learning video about AM radios that finishes up where zPoly: 870 left off. It covers how AM a radio station puts information on its carrier wave, how radios decode that information and how amplification can be accomplished.
zPoly: 900 dL (chladni plates demonstration)
https://youtu.be/veVSOXHeou4
a youtube by a woman who does a really good job on chladni plates . . .
https://youtu.be/wYoxOJDrZzw (not mine)
This is a rather inexpertly produced distant learning video that uses the equipment we have available at Poly to present the theory behind and a demonstration of two-dimensional standing waves using Chladni plates. If you aren't one of my students and want to see a considerably better produced YouTube on the subject, I'd suggest you go look at https://youtu.be/wYoxOJDrZzw.
zPoly: 920 dL (dancing flames)
https://youtu.be/7-RBz3ZjuGk
This is a distant learning video of Dancing Flames demo in which music is directed down a ten-foot tube motivating fingers of flame spaced one-inch apart to dance whenever resonance frequencies for the tube are hit. It has copyrighted music in it but the video is for educational purposes, is not commercial, is not for profit and is shown privately without ads.
2021 distant learning
zPoly:110 (cart down incline lab)
https://youtu.be/WSxjpPvecpk
This is a distant-learning lab in which a cart is allowed to free fall down a ramp of known angle.
zPoly: 112 (how to format a lab write-up—Honors Physics)
https://youtu.be/sr7qg0ZlOd4
This is a distant-learning video designed to explain how we want our lab write-ups formatted.
zPoly: 114 (data for Double Atwood Machine lab)
https://youtu.be/yy1m3suwBHw
This is a distance learning video that shows and collects data for a Double Atwood Machine lab.
zPoly: 116 (Work Lab L-10)
https://youtu.be/_3YmPv-pmwc
This is a distant learning lab on work.
zPoly: 118 (Impulse lab L-8 dist)
https://youtu.be/bkNx4mlhQk4
This is a distant learning lab on impulse.
zPoly: 120 (Ballistic Pendulum lab L-11cov)
https://youtu.be/B1Bv_AVnS3c
This is a distant learning lab designed to determine the muzzle velocity of a “gun” using conservation of energy and momentum and a Ballistic Pendulum device, then checking that value using the gun of the Ballistic Pendulum to fire into the room, take distance and height data, and use kinematics to determine the muzzle velocity.
zPoly: 122 (rotational vector notation)
https://youtu.be/vCLn8vy1pLQ
This video explains how rotational vectors are denoted as vectors. It essentially explains how to decode the information given when a rotational vector like angular velocity or torque is presented in full vector notation.
zPoly: 124 (rotational strangeness—the flopping wheel and its precessing cousin)
https://youtu.be/xCSSJu20JkI
This video shows two demonstrations, one in which a rotating wheel is tweaked and one in which a pinned wheel is motivated to “fall.”
zPoly: 126 (rigid body pinned beam lab)
https://youtu.be/J2fHPsjGugs
This is a distance learning lab that utilizes a pinned beam to give students the opportunity to do torque calculations along with playing with the idea that the sum of the torques about any point (the pin in this case) must equal zero if the body is to be in equilibrium.
zPoly: 128 (hoop and cart down incline lab)
https://youtu.be/ZSkjLoaNHLc
This is a distant learning lab that allows students to use Tracker software to compare the velocity of a cart accelerating down an incline to a hoop accelerating down that same incline
zPoly: 130 (standing wave on rope demo)
https://youtu.be/f7hB61i4jDc
This is a distant learning demonstration of a rope executing standing waves.
zPoly: 132 (long-tube standing wave demo)
https://youtu.be/qy5O4vG5afY
This is a distant learning demonstration of a long, wide tube in which a standing wave is generated by air rising, warmed by a Bunsen burner.
zPoly: 134 (stadium horn standing wave demo)
https://youtu.be/8pXYeWfZ0Kc
This is a distant learning demonstration in which standing waves are generated in a stadium horn. At the end, the horn is attached to a two-meter long pvc pipe generating a very, very low frequency sound (kinda cool).
zPoly: 136 (lightbulb boxes circuit design)
https://youtu.be/VO1mhdIrKcU
This is a distant learning presentation that explains how you can take a combination of three lightbulbs and two switches that are electrically connected in an unknown way and determine how they are wired together.
zPoly: 138 (lightbulb circuit box #2)
https://youtu.be/J9IR0f83DPM
This is distant learning lab data. In the video, a lightbulb box (#2) consisting of three lightbulbs and two switches is presented. The student’s goal is to determine how the bulbs and switches are wired together.
zPoly: 140 (lightbulb circuit box #4)
https://youtu.be/7Ujvb4jjvHc
This is distant learning lab data. In the video, a lightbulb box (#4) consisting of three lightbulbs and two switches is presented. The student’s goal is to determine how the bulbs and switches are wired together.
zPoly: 142 (lightbulb circuit box #5)
https://youtu.be/hdewmA3pUOE
This is distant learning lab data. In the video, a lightbulb box (#5) consisting of three lightbulbs and two switches is presented. The student’s goal is to determine how the bulbs and switches are wired together.
Preamble to Summer Session
zPoly: 1200 (Fletch and Crashwhite)
https://youtu.be/XydGb5ulODg
This is the preamble to the Summer Assignment for the AP Physics class at Polytechnic School’s. What’s interesting about it is that it highlights a very fun relationship between the two AP teachers.
Off the Wall:
Cat playing in tub
https://youtu.be/6dOcbKUekWQ
title says it all
Cat making catch in tub
https://youtu.be/CN1q_XkgT4g