Thank you. Helpful and kinda entertaining to watch for some reason.

nice

What modeling package is this?

Very helpful, I've played around with the lighting but there's great info I didn't know about. Question: How did you get your editing interface and the run interface on separate pages? Mine has a split-screen with the edit on the left and run on the right. I've looked and looked and can't find how to access this change to the UI (user interface).

Awesome! Looking forward for the analemma

Earth is shiny … there is a sunglint

You need to set the x0 = x when checking if the ball.y <= 0. When setting it to: 0 it just teleports the ball back to the center of the screen, but by updating the initial x to the current x, the x velocity works correctly! P.s: I didn't understand whatever you were talking about with the math and stuff, so I just looked at the code and studied what it was doing. I needed the formula for this for a project I am working on, so thanks for the video! EDIT: Heres the fixed code: GlowScript 3.2 VPython g1 = graph(xtitle="t [s]",ytitle="y [m]",width=500, height=150) fp = gcurve(color=color.blue) g2 = graph(xtitle="t [s]", ytitle="v [m/s]",width=500, height=150) fv = gcurve(color=color.red) g3 = graph(xtitle="t [s]", ytitle="E [J]",width=500, height=150) fK = gcurve(color=color.blue) fU = gcurve(color=color.red) fE = gcurve(color=color.magenta) R = 0.01 floor = box(pos = vector(0,-0.005-R,0),size=vector(.5,0.01,0.2)) h = .3 #g = vector(0,-9.8,0) g = 9.8 m = 0.02 x0=0 y0=h vx0=1 vy0 = 0 c = 0.5 ball = sphere(pos=vector(x0,h,0), radius=R, color=color.yellow, make_trail=True, trail_type="points", interval=1, retain=1000) t = 0 dt = 0.01 bt = 0 while t< 4: rate(100) x = x0 + vx0*bt y = y0 + vy0*bt - .5*g*bt**2 vx = vx0 vy = vy0 - g*bt ball.pos = vector(x,y,0) if ball.pos.y<=0: vy = -sqrt(c)*vy vx = sqrt(c)*vx vy0 = vy vx0 = vx x0 = x # THIS IS WHAT I CHANGED, Originally it was resetting the x0 to 0, but by setting it to the current x pos of the ball, it continues its x motion y0 = 0 bt = 0 K = .5*m*(vx**2+vy**2) U = m*g*y E = K+U fp.plot(t,y) fv.plot(t,vy) fE.plot(t,E) fK.plot(t,K) fU.plot(t,U) t = t + dt bt = bt + dt print("t = ",t, " s")

When are the next 24 problems scheduled for? :)

Yeah, this is kewl AND fun. I like this one a lot. 🌍

kewl

24 problems really goes by fast! 🏁

Can't you simply just use gausses law without integrating since it is a closed 3d loop and the electric field is conservative?

only 2 comments?

It’s the same problem in the 7th ed. Ans 240 μV, so same answer. I didn’t check thee others yet.

What do you mean at 6:52 when you say the change in potential around the loop is not zero?

You're work is superb, and your joyful approach is very engaging. Thank you. Can I make one polite suggestion please? Instead of keep saying "fake gravitational field." Maybe you could use a more explanatory term. The Earth is in orbital motion around it's Barycentre, the common centre of mass with the Moon, as you explained at the beginning of your talk. Therefore, the fake field is due to a *"centrifugal"* effect. Although, I have heard it referred to as the *"translating inertial field"* recently. To distinguish it from the apparent gravitational and centrifugal forces in a non-inertial reference frame. Anyway, it doesn't really matter because your stationary globe Earth model was very impressive. Thank you for sharing.

Such a great video! You know the math - you nailed it! 👏👍

Here from the Physics Explained channel... ❤

At 12:55 the centripetal accel: a_c = v^2/r Centripetal force is mv^2/r. In case anyone pauses at that.

Powerful, even for such a simple bit of code!

😎

sir i have another question we are solving this air resistance force for ball 2... right and we modify the air resistance force equation for ball 2 and we change it in momentum equation than why you use momentum equations for ball1

0.0036 - 0.004 = -0.0004 not 0.0032. Also it looks like F3 is larger by modulus than F1 which can't be right, no? Missing a decimal zero? Am I missing something?

why you used 0.5rho for what reason i am stuck

Can you talk about orbital decay in binary stars(as a question or something) and how if we used the equation on the moon and the earth we can find the time when the moon was formed.

I think your answer is off. If you use Thevenin's theorem, the circuit becomes a 12 volt battery in series with two resistors of value r/2 each (since R = r/2 and the Thevenin derived resistor is r/2); since they are in series, they have a combined resistance of r. So the current through R is 12volts/0.3 ohms = 40 amps and the power across the resistor R is I x I x R = 1600 x 0.15= 240 watts

I always love your videos to review physics. Out of school a long time, but the review is useful

Thanks!

😎

i usually dont comment but thank you i understand the problems better now

Chalk is a teacher's war paint.

Thank you very much, was trying to understand how we got unit vectors of spherical coords and this was my saving grace.

Good content and very well explained. Thank you!

I'm sorry this is off-topic, but I watched, what I thought was a short, this morning of a mass suspended by two cables, and I wanted to refer to it and can't, for the life of me, find it. I've looked through all your videos and shorts and it doesn't show up. Maybe it was deleted? Sorry for the trouble, but can you give the link to this video/short please?

Fun with capacitors! ---| |------| |---

So, if you have a potato, you can't surround it with a sphere and get the E-field.

(1/8)x9.8xHangtime² Easier to understand imo.

Can you make a video about the derivation ❤❤❤

Great example, and VPython only makes it better.

delta t should be approaching 0 for it to be pointing towards the center

It's always extra fun when the two values match!

I've always found this to be such a fascinating concept!

Wow and you do E&M too?! Awesome!

Hello sir I'm from India. I am only interested in theoretical physics as well as pure and applied mathematics

Just what I was looking for.. Amazing, how do I host it as the background of my website?

Amazing video. Much appreciated

Very nice. VPython is a very nice tool, and the 'fast=False' is a handy bit of code too.

Got a lot done! Can look forward to more fun to come, and that's always good. 👍

I always like the comparison problems - numerical vs. theoretical!

I thoroughly enjoyed this lesson. Peak lesson. Peak teacher.