SammyS's latest activity
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If you study Cosmology or Quantum Mechanics, you will quickly find that your intuition is not just useless, it is actually... -
SammyS reacted to Orodruin's post in the thread Writing a vector parallel and normal to a unit vector ##\hat n## with
Like.
I actually think ##\vec A - (\vec A \cdot \hat n)\hat n## is nicer than the double cross product. It also generalises to any dimension. -
SammyS reacted to kuruman's post in the thread Angular motion of a car wheel traveling at certain speed with
Agree.
Either way you will get the same answer if you do it right. Using the average angular velocity as @jbriggs444 suggested is more... -
SammyS reacted to jbriggs444's post in the thread Angular motion of a car wheel traveling at certain speed with Agree.
Or, another approach, can you (@inuka00123) find the average angular speed over the interval?
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$$\frac{1-\delta}{[2(1-\delta)]^{\frac{3}{2}}} = \frac{1}{2^{\frac{3}{2}}} (1-\delta)^{-\frac{1}{2}} \approx \frac{1}{2^{\frac{3}{2}}}...
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SammyS reacted to berkeman's post in the thread Acceleration of an Electron in a Uniform Electric Field with Agree.
Now that I can see your calculations separated, I think your numbers are correct.
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SammyS reacted to fresh_42's post in the thread Why do we spend so much time learning grammar in the public school system? with Agree.
If I look at advertisements, and even some news channels these days, I'd rather say that more grammar should be taught, not less.
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SammyS reacted to mathwonk's post in the thread I Localising a non integral domain at a prime with Like.
aside: (preachy commentary, hopefully useful;) By the way, please forgive me, but from your questions, I have the impression you have...
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SammyS reacted to kuruman's post in the thread B The focal length of the eye and image inversion with Like.
And then there is the Erismann experiment.
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SammyS reacted to berkeman's post in the thread Measurement technology textbook problems with Agree.
I think that you have received a DM by now from the Mentors mentioning that we usually prefer just one problem per thread. It is hard...
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SammyS reacted to haruspex's post in the thread 2D rigid body mechanics: force applied on sliding cart with Agree.
Using the leading caster as the axis, the angular acceleration is ##a/(H/2)## Net torque about the leading caster...
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SammyS reacted to haruspex's post in the thread 2D rigid body mechanics: force applied on sliding cart with Like.
It is always valid to work in an inertial frame; no exceptions. And it gives the same answer. It is also valid to work in any...
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SammyS reacted to berkeman's post in the thread 2D rigid body mechanics: force applied on sliding cart with Like.
After redacting the reference to several AI chatbots, the thread is reopened provisionally. Thanks for your patience.
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SammyS reacted to fresh_42's post in the thread I Definition of minimal ideal using symbolic logic notation with Like.
I think I didn't understand you. Do you want to use logical symbolism because you study logic, or because you want to clarify the...
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SammyS reacted to berkeman's post in the thread 2D rigid body mechanics: force applied on sliding cart with Agree.
Thread is locked temporarily for Moderation...