TSny's latest activity
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TSny replied to the thread Block drifts off between two moving planes through friction.Yes. I think that's it! :smile: The two friction forces are represented by f. ##\vec W_1## is the velocity of the block relative to... -
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TSny replied to the thread Block drifts off between two moving planes through friction.This formula definitely works. I've tested it with several arbitrary choices of u1 and u2. I noticed from the numerical solution that...
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TSny replied to the thread Block drifts off between two moving planes through friction.Your divination works! You took ux < uy, but that's ok. [Edited]
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TSny replied to the thread Block drifts off between two moving planes through friction.Mass is playing the role of inertia here, rather than associated with gravity.
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TSny replied to the thread Block drifts off between two moving planes through friction.I still don't see an analytic solution. The only relation for the final velocity components that I have found is ##\large...
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TSny reacted to haruspex's post in the thread Block drifts off between two moving planes through friction with
Like.
Your result is probably more accurate. I modelled it in a spreadsheet with fairly coarse timesteps. -
TSny replied to the thread Block drifts off between two moving planes through friction.I tried setting up the equations of motion and used Mathematica to solve them numerically. I get similar results to @haruspex 's post...
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TSny replied to the thread Block drifts off between two moving planes through friction.I think the behavior is to be expected. Just after release, the block will pick up a small velocity in the 45-degree direction as shown...
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TSny replied to the thread A hanging ring carrying current in a uniform magnetic field.I believe the figure given in the problem statement is incorrect. It should be as shown on the right. [Edit: Specifically, the string...
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TSny reacted to kuruman's post in the thread Variable Mass system : Sand falling into a Freight car with Like.
I grappled with this point when I was putting together the article mentioned in post #2. Eventually I decided to reserve the word...
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TSny reacted to Su6had1p's post in the thread Variable Mass system : Sand falling into a Freight car with Like.
@TSny @kuruman thanks for your help.
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TSny reacted to kuruman's post in the thread Variable Mass system : Sand falling into a Freight car with Like.
You may wish to read this article that discusses how to approach variable mass problems and the pitfalls to watch for. There is a...
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TSny replied to the thread Variable Mass system : Sand falling into a Freight car.I think you are ok up through the following line: But your result for ##C## is not correct: Check your work. Your method is fine...
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TSny replied to the thread A Question about Weinberg's GR book.Tλλ The objective is to determine the free-fall equations of motion to order ##\frac {\overline{v}^4}{\overline r}.## This requires...
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TSny replied to the thread A Question about Weinberg's GR book.The reason that ##^4_{R_{i j}}## is not included in the list (9.1.26) through (9.1.29) is because this list is meant to include only the...
