haruspex's latest activity
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haruspex replied to the thread Minimum height of water to make the particle visible.As stated in post #1, @palaphys knows how to solve the problem. The question being asked of the forum is why the suggested alternative... -
haruspex replied to the thread Correct statement about a reservoir with an outlet pipe.Not quite that simple. When you put your finger on the top the air pressure is still atmospheric: same number of molecules at the same...
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haruspex replied to the thread Flux through a ring due to two charges.Then I confirm your results. What would the net flux be if they were both +q and equidistant on opposite sides? (Consider symmetry.)...
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haruspex replied to the thread Static Mechanics: Aircraft Nosewheel Linkage Torque.A free body diagram shows the forces on a single rigid body. Here you have a linkage, so you need an FBD for each moving part. This...
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haruspex replied to the thread Stacked blocks & pulley system.Do you mean, you don’t know if it is the smallest mass that would cause them to slide up? Why does that matter? What allows you to...
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haruspex replied to the thread Rolling without slipping on a curved surface.Ok, I'll give you that one.
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haruspex replied to the thread Rolling without slipping on a curved surface.No, that doesn’t work either. You cannot add angular velocities that are around different axes. What axis would the resulting angular...
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haruspex replied to the thread Rolling without slipping on a curved surface.Good. That's unlikely to work. Energy conservation equations are time independent . No, you can't do that. The motion of a rigid body...
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haruspex replied to the thread Correct statement about movement of curve ball in a fluid.Right
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haruspex replied to the thread Correct statement about movement of curve ball in a fluid.The arrows on the airflow show the relative motion. If the air is actually still, which way is the ball moving?
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haruspex replied to the thread Correct statement about movement of curve ball in a fluid.I have a feeling I have misled you on statement 1. From experience, there should be downward pressure on the ball. And if the air is...
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haruspex replied to the thread Correct statement about movement of curve ball in a fluid.Yes, and the reasoning you give is ok. I would have described it as the flow lines are compressed below so the air pressure is greater...
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haruspex replied to the thread Problem about units conversion: cm^2 --> m^2.If ##x=y ## then ##x^2=y^2##. If ##10cm=(1/10)m## then what is ##(10cm)^2##?
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haruspex replied to the thread Rolling without slipping on a curved surface.Yes, you do seem to have a sign error in post #59, but where exactly it is depends which sense you are taking as positive for each...
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haruspex replied to the thread Rolling without slipping on a curved surface.If you mean compared with what I posted in post #60, I only meant that your numerator/denominator term reduced to that. I dropped the...