haruspex's latest activity

Not so.

Yes.

Not quite, and this makes the question quite tricky. It is (minus) the ratio of the relative velocity components normal to the plane of...

As stated in post #1, @palaphys knows how to solve the problem. The question being asked of the forum is why the suggested alternative...

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...

Then I confirm your results. What would the net flux be if they were both +q and equidistant on opposite sides? (Consider symmetry.)...

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...

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...

Ok, I'll give you that one.

No, that doesn’t work either. You cannot add angular velocities that are around different axes. What axis would the resulting angular...

Good. That's unlikely to work. Energy conservation equations are time independent . No, you can't do that. The motion of a rigid body...

Right

The arrows on the airflow show the relative motion. If the air is actually still, which way is the ball moving?

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...

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...