Richard

Physics Teacher - South West. Born at 323 ppm

[ALASTAIR CAMPBELL @campbellclaret]

Mmm.

[Richard @IvesRichives]

@stanbaugh @fermatslibrary Just a point of clarification, if - by ω - you mean angular velocity, then ω for r and 1/2 r don’t have different magnitudes - they are the same. It is the magnitude of the linear velocity (v) that is different for r and 1/2 r.

[Richard @IvesRichives]

@shahidkamal Totally agree. Wandered around Haringey with my daughter on Saturday talking and laughing with people of all cultural backgrounds… it was beautiful

[BBC Humberside @RadioHumberside]

Volunteers in Hull have turned out to help clean up after yesterday's far-right protests. Read more: https://t.co/3EpB2BhJnH

[Richard @IvesRichives]

@stanbaugh @fermatslibrary But linear (or tangential) velocity is constantly changing due, as you say, to the changing direction of the velocity. It is this changing linear velocity which gives rise to centripetal acceleration.

[Richard @IvesRichives]

@stanbaugh @fermatslibrary Hi Rich - thanks for the detailed explanation, it's appreciated. Tbh, I think the issue is that you are conflating angular velocity and linear velocity. Angular velocity for any point on a rotating disc is constant (the vector is perpendicular to the plane of rotation)....

[Esheru @Eshprojet1]

Wow!!

[Richard @IvesRichives]

@stanbaugh @fermatslibrary And point B in the animation is not making a cycloid shape as it is not on the circumference of the circle rolling along (the red line).

[Richard @IvesRichives]

@stanbaugh @fermatslibrary Not quite?

Let me ask a question; consider the animation above is of a solid disc rotating about its axis (e.g. a flywheel). Both points are points on that fixed disc a different distance from the centre. Are you claiming that the angular velocity of each point is different?

[Richard @IvesRichives]

@stanbaugh @fermatslibrary ω is the same for both circles - it is the linear velocity that is different due the different radii.

[Martin Lewis @MartinSLewis]

Not again! I have NOT given my permission to be used in political adverts. This is NOT an endorsement by me in any way. I maintain strict party neutrality and am unhappy at the weaponizing of my reputation in this way.

While this isn't as bad as the first terrible representation – which said it this about tax - there's still a misdirection. As I’ve already stated, in that private conversation I was referring to Labour hoping to make a positive change I’ve been campaigning for, but it didn’t want to lock it in the manifesto as it can’t promise to deliver.

NO party’s manifesto tells the full story. ALL parties have things they hope to do but that aren’t in manifestos – as they can’t guarantee to deliver. The idea that Labour is an outlier for that is preposterous.

[Jonathan Pie @JonathanPieNews]

Election Special: 2. Immigration

[Richard @IvesRichives]

@DIshoil @edmunds_dr We’re considering it. Put off by the amount of work to swap resources etc. how difficult did you find it?

[Richard @IvesRichives]

Just wondered if anyone has done it and can offer any advice on which spec you moved to and how difficult you found the change in terms of resources, knowledge, assessment etc. Any feedback/ advice would be greatly appreciated! 2/2

[Richard @IvesRichives]

@ChatPhysics so don’t want to knee jerk but we considered leaving @AQA last year but decided to give it another year. And now after picking our students up again today we are revisiting this. Obvious issues are the potential workload in changing resources over to a new spec. 1/2

[Dr Dan Jones @Hookean1]

A-Level Physics teachers. Would you would like to give your students a chance to read Physics case studies, then answer A-Level Qs on them? This resource might be useful. From the WJEC archive. Some lovely topics. I have others if needed. Pls RT! ⚡️📷 🚀https://t.co/WocxklBnb3

[Dr Dan Jones @Hookean1]

GCSE Science teachers. Some nice revision ppts here
https://t.co/PYjrZw08T9

[John Rudolph @JLRudolph]

Okay, hoping to get the word out about the new book. 5 copies to give away. Retweet to put your name in for a drawing for a FREE BOOK! (Winners announced at the end of the week.) Great for your summer reading. https://t.co/UwqPHbglOs

[Led By Donkeys @ByDonkeys]

Pandemic Profiteer