Flipping Physics

The dielectric constant is just a multiplier. A vacuum is exactly 1. Dry air is 1.00059. Rubber is 3.0, so a rubber dielectric gives you 3 times the capacitance a vacuum would. That is all it tells you. youtu.be/KL-GfLDGmN8 #iTeachPhysics #Physics #Science #EduSky #APPhysics

Live Kahoot on my YouTube channel, Monday November 2nd at 7pm Eastern. 10 multiple choice questions on AP Physics 1 Unit 2, Forces and Translational Dynamics. Free, and a lot more fun with a crowd. youtu.be/SCQ5dDoWKkc #iTeachPhysics #APPhysics1 #Physics #EduSky #Kahoot

Summing the forces on a free body diagram is just tip to tail vector addition. Same thing you already know how to do. And the order you add them in does not matter, which surprises students every time. youtu.be/-n0fdAIOLag #iTeachPhysics #Physics #Science #EduSky #APPhysics1

I sorted all 700+ of my physics videos into 8 more curricula: IB, JEE and NEET, A Level, MCAT, Philippines DepEd, Ontario, Australia, Gaokao. Free pages for each on my site. The laws of physics are the same everywhere. youtu.be/ocUkYKoPYp0 #iTeachPhysics #Physics #EduSky #IBPhysics

Two point charges, find the net electric field at a point P. Billy solves for the angle, then realizes he never needed it: sine theta was 0.4 over 0.5 all along. Electric field vectors add exactly like forces do. youtu.be/sjPqFxdnCzM #iTeachPhysics #Physics #Science #EduSky #APPhysics

I measured the dielectric constant of printer paper with a capacitor made of foil and paper. Stack sheets, measure capacitance, linearize, take the slope. Out comes 2.4, and the published range is 2 to 4. youtu.be/2uNivhQd3hA #iTeachPhysics #Physics #Science #EduSky #APPhysics

Electric potential is a scalar, so superposition is just addition. Two point charges, one unknown, and the spot where the total potential is zero tells you the sign and relative size of that charge before any algebra. youtu.be/QG9gutOktvs #iTeachPhysics #Physics #Science #EduSky #APPhysics

Acceleration in meters per second squared is also meters per second every second. A basketball on an incline makes that click. Same constant acceleration rolling down and coming back up. youtu.be/gc_j1K3UA6w #iTeachPhysics #Physics #Science #EduSky #APPhysics1

New lesson: add a dielectric to a capacitor held at constant potential difference. Capacitance increases. Charge increases. Net electric field does not change at all. Bobby asks how, and answering him is the whole video. youtu.be/PiVyi7854eY #iTeachPhysics #Physics #Science #EduSky #APPhysics

Aluminum foil, printer paper, a dictionary, and 120 pounds of mass. That is a real parallel plate capacitor. The paper is the dielectric and has to be wider than the foil so the plates never touch. Reads 11.73 nF. youtu.be/Nev4F_QR03A #iTeachPhysics #Physics #Science #EduSky #APPhysics

New lesson: deriving the electric field between the plates of a parallel plate capacitor, then applying it to a homemade aluminum foil and printer paper capacitor. One plate ends up with about 670 billion more electrons than protons. youtu.be/W_P1HY82zm0 #iTeachPhysics #Physics #EduSky #APPhysics

Zero work to move a charge along an equipotential surface. Both forces perpendicular to displacement. Same thing in gravity. Two different fields, same idea, zero work every time. youtu.be/RcixASy2XmI #iTeachPhysics #Physics #Science #EduSky #ElectricPotential

Electric field lines are always perpendicular to equipotential surfaces. Parallel plates, point charge, electric dipole. Every case, 90 degrees. Know one map, construct the other! youtu.be/mL-_HSorl00 #iTeachPhysics #Physics #Science #EduSky #ElectricField

Physics teachers: want to do a projectile motion demo your students will never forget? Drop a ball from a moving car and land it in a bucket. New video walking through exactly how to do it! If you try it, send me the video. youtu.be/cN3iaOQysLs #iTeachPhysics #Physics #Science #ProjectileMotion

Three different tension values. Three different situations. Same system. A force sensor captures Newton's 2nd Law in real time on a cart-and-pulley setup. Physics demonstrated! youtu.be/Lo70OFza4-w #iTeachPhysics #Physics #Science #EduSky #NewtonsSecondLaw

The AP Physics 1 YouTube Live Kahoot schedule for 2026-2027 is here! 🎉 One session per unit, Monday evenings, 10 multiple-choice questions, 7pm ET. First up: Unit 1 Kinematics on September 14, 2026! youtu.be/ekPLvQeJaNM #iTeachPhysics #Physics #Science #EduSky #APPhysics1 #Kahoot

AP Physics 1 teachers: new video just for you! Introducing student worksheets and guided lecture notes for every AP Physics 1 topic. Included free with bulk orders of my URP. Free teacher preview available! youtu.be/6vdoRUc6Z3Q #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics1

Common misconception: constant speed in a circle = no acceleration. Wrong! 🔄 Velocity is a vector. Direction always changes, so velocity changes, so there is centripetal acceleration! youtu.be/esf_5HGEbBs #iTeachPhysics #Physics #Science #EduSky #CentripetalAcceleration

I ran out of weights. Plus, it took me 30 minutes to perform the whole experiment when taking all the weights on and off each time. Another fun observation, I left all the weights on for 24 hours and then took new measurements. As you can imagine, the capacitance of the capacitor increased again!

Every year in late April I hear "I wish I'd known about Flipping Physics earlier!" So this year, Bo is presenting everything Flipping Physics has to offer for AP Physics 1, 2, C: Mechanics, and C: E&M. 📚 youtu.be/zm4FOpd24_4 #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics

New lesson: build a real parallel plate capacitor from aluminum foil and printer paper, measure its capacitance, and experimentally determine the dielectric constant of printer paper. Then discover it is not quite ideal! youtu.be/WmzqDjl_7Z8 #iTeachPhysics #Physics #Science #EduSky #SciComm

6 fast and fun Bernoulli's Principle demos in one video! 🌀 Faster fluid = lower pressure. See it happen right in front of you. Physics is awesome! youtu.be/ky4ZZ95SzRw #iTeachPhysics #Physics #Science #EduSky #BernoullisPrinciple

We are back from summer hiatus! 🎊 Welcome back to school to everyone in the USA. New lesson: vacuum permittivity and the dielectric constant. youtu.be/uO88XV1Eoew #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics

Fear not, physics returns in mid-August! The final moments of the Galápagos trip on Seymour Norte. 🌊 Golden light, lava stones, a trail toward the sea, and one last look through a hole in a lava rock. Not a bad way to say goodbye. youtu.be/9uFIiUPmICU #Galapagos #SeymourNorte #GalapagosFarewell

Fear not, physics returns in mid-August! Seymour Norte: Magnificent Frigatebirds with red pouches on full display, then the group discovers what a fisheye lens does to a group photo. 🐦 Both worth watching. youtu.be/Qm5ftKYaTXM #iTeachPhysics #Nature #Galapagos #MagnificentFrigateBird #SeymourNorte

Fear not, physics returns in mid-August! Seymour Norte: boobies on the trail, a fluffy chick staring into the camera, and one very dramatic booby on a cairn posing for a nature documentary. 🐦 youtu.be/a3oPxH-V3QI #iTeachPhysics #Nature #Galapagos #BlueFootedBooby

Fear not, physics returns in mid-August! Three Galápagos locations in time lapse: Playa Ochoa, Kicker Rock, Post Office Bay. 🌊 The Galápagos does not slow down for anyone, but time lapse makes it look like it does. youtu.be/0gn73wuYhzA #iTeachPhysics #Nature #Galapagos #KickerRock #PostOfficeBay

Fear not, physics returns in mid-August! Rocks covered in marine iguanas near Isla Isabela, and then — one Galápagos Penguin among them. 🐧 The only penguin north of the equator, owning that lava rock. youtu.be/0Oqpu_x0CUk #iTeachPhysics #Nature #Galapagos #GalapagosPenguin #MarineIguana

Fear not, physics returns in mid-August! Lava fields at Punta Moreno, Isla Isabela. 🌋 Black rock as far as you can see, dramatic cracks, and little pockets of bright green tucked in. It looks like another planet. youtu.be/eYAu3UljKtk #iTeachPhysics #Nature #Galapagos #PuntaMoreno #IslaIsabela

Fear not, physics returns in mid-August! White sand beach at Punta Cormorant, Floreana Island. 🐢 Chased a lightfoot crab, took a family photo, watched two sea turtles ride the waves offshore. Just another afternoon in the Galápagos. youtu.be/bd_sJp3KPZ0 #iTeachPhysics #Nature #Galapagos #SeaTurtles

Fear not, physics returns in mid-August! Green sand beach, flamingo lagoon, extinct tuff cone, white coral sand beach. All on one short trail at Punta Cormorant on Floreana Island. 🌋 The Galápagos is extraordinary. youtu.be/0n6WMmRDp-k #iTeachPhysics #Nature #Galapagos #FloreanaIsland

Fear not, physics returns in mid-August! A Galápagos Hawk with a Nazca Booby chick in its talons, right off the trail at Punta Suarez. A second hawk waits nearby. 🐦 Nature is not always easy to watch. youtu.be/vJRR5r5eLVY #iTeachPhysics #Nature #Galapagos #GalapagosHawk

Fear not, physics returns in mid-August! Until then: not one but two Nazca Booby nests on the Punta Suarez trail. 🐦 One literally in the path. Both with an adult and a fluffy chick. Two for the price of one! youtu.be/bcI-_81E1XY #iTeachPhysics #Nature #Galapagos #NazcaBooby #PuntaSuarez

Fear not, physics returns in mid-August! Until then: hiking Punta Suarez with my daughter Ryan when Christmas Iguanas kept blocking the path. 🦎🎄 Striking red and green coloring. Zero interest in moving. youtu.be/UhpK-c4f8Ec #iTeachPhysics #Nature #Galapagos #ChristmasIguana #PuntaSuarez

Fear not, physics returns in mid-August! Until then: our guide Nancy explains marine iguanas at Punta Suarez while the iguanas sit right there and listen. 🦎 Patiently. Mostly. A few had places to be. youtu.be/tvhVzMeVIm8 #iTeachPhysics #Nature #Galapagos #MarineIguana #PuntaSuarez

Fear not, physics returns in mid-August! Until then: a sea lion at Gardner Bay decided I was worth investigating. 🦭 Swam right up and nosed around my legs and pants. Not sure what it was looking for. Very thorough though. youtu.be/oYndjJ2UU0c #iTeachPhysics #Nature #Galapagos #SeaLion #GardnerBay

Fear not, physics returns in mid-August! Until then: Gardner Bay, Española Island. 🦭 We got in the water and sea lions came right to us, darting around and playing. Then on the beach: pure sun-soaked bliss. youtu.be/PWL-NVUYwBI #iTeachPhysics #Nature #Galapagos #SeaLions #GardnerBay

Fear not, physics returns in mid-August! Until then: the David Rodríguez Giant Tortoise Breeding Center on San Cristóbal. 🐢 Young tortoises in enclosures and one half-meter-wide giant up close. Incredible! youtu.be/3VHVDG8WcyI #iTeachPhysics #Nature #Galapagos #GiantTortoise #Wildlife

Fear not, physics returns in mid-August! Until then: a mama sea lion and her pup walked straight up to the camera in the Galápagos and stayed for almost 3 minutes. 🦭 Zero fear of humans. What a moment! youtu.be/V8rtAwQ7GOA #iTeachPhysics #Nature #Galapagos #SeaLions #Wildlife

Fear not, physics returns in mid-August! Until then: hiking Punta Pitt on San Cristóbal Island in the Galápagos. 🥾 Rugged terrain, wide open views, and a side of the islands you cannot get from the beach. youtu.be/AOhPd4QCaHc #iTeachPhysics #Nature #Galápagos #PuntaPitt #Travel

Fear not, physics returns in mid-August! Until then: Sally Lightfoot Crabs on the lava rock at Black Turtle Cove in the Galápagos. 🦀 That red and orange against dark volcanic rock is stunning. youtu.be/LeLWZU_U6Hs #iTeachPhysics #Nature #Galapagos #SallyLightfootCrab #Wildlife

Fear not, physics returns in mid-August! Until then: an evening stroll along Playa las Bachas in the Galápagos. White sand, calm water, peaceful sunset. Sometimes slow is exactly right. 🌅 youtu.be/WD_yTOHd8f4 #iTeachPhysics #Nature #Travel #Galápagos #PlayalasBachas

Fear not, physics returns in mid-August! Until then: a Galápagos giant tortoise eating a papaya and loving life. 🐢🍈 These gentle giants are even more incredible up close. youtu.be/iouRgTWDL1c #iTeachPhysics #Science #Nature #Galápagos #GiantTortoise

I have a quandary. My family visited the Galápagos and I have made 5 short videos so far with ~20 more to make. Should I publish them this summer while physics is on pause? Or will it confuse my audience? Let me know! youtu.be/DnCo7ZXL1T4 #iTeachPhysics #Physics #Science #EduSky #Galapagos

This has nothing to do with physics. I just really want to be on Survivor. I have been applying annually since I was 39. This year I did an open call audition. Plus I look like Ozzy and Rupert had a kid together. Put me on! youtu.be/XcFDIfcCH5U #iTeachPhysics #Physics #Science #EduSky #Survivor

Just wrapped up my second AP Physics Reading. If you are an AP Physics teacher and have never been, apply. Best professional development out there. Also: my last physics video until mid-August. Have a wonderful summer! youtu.be/0OtXXdOUNaI #iTeachPhysics #Physics #EduSky #SciComm #APPhysics

New lesson on parallel-plate capacitors and dielectrics! ⚡ Add a dielectric to an isolated capacitor: electric field decreases, potential difference decreases, capacitance increases. Bobby, Billy and Bo explain why! youtu.be/89S9FYWwJgE #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics

The natural length of a spring is the length of the spring with no forces acting on it. 🌀 Simple concept, but it trips up so many students! Here is a quick demonstration that makes it crystal clear. youtu.be/6Jx7A64ltrQ #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics1

This one has nothing to do with physics! 😄 My daughter Ryan (@rtp_tattoos) is a tattoo apprentice in LA this summer. Venice Beach area, mid-June to early August, reduced price! youtu.be/LiYxQDMjza0 #Tattoo #TattooArtist #SupportArtists #VeniceBeach #LosAngeles

Torricelli's Theorem + projectile motion + a rain barrel + a rubber ducky = physics is awesome. 🧤💦 I predicted exactly where the water would land and placed a rubber ducky there. Physics works! youtu.be/w0tyLO8QQ90 #iTeachPhysics #Physics #Science #EduSky #SciComm #APPhysics1