haruspex's latest activity

Do you have to do something about the contact points? I don’t understand the question. Yes. Can you answer my questions in post #3?

I assume the rotation rate is constant. What is the acceleration of the cone's mass centre? What do you deduce from that? Would it be...

I am sorry, but I am rather snowed now. I'll try to get back to this in a day or two.

A smoother result can be had by interpolating with splines, e.g. cubic splines: https://en.wikipedia.org/wiki/Spline_interpolation

It isn't clear to me whether reflections are considered to be the same, e.g. is YRRBB the same as YBBRR? If so, there are only four.

Thinking about it some more, I have decided it is not helpful to describe it the way I did, with the ##\lambda v^2## being subtracted...

Now I'm confused… you previously mentioned "indagate", an archaic but valid word meaning to investigate, from the Latin "indagare"...

The retardation force on the horizontal portion is not the only reason the tension reduces. Consider a massless string but with a mass...

Think about the connection between those observations.

It is stated as frictionless, but it makes no difference anyway.

Sure, but that’s just two plates. What if, e.g., we start with two positively charged plates then add a grounded plate, not between...

The tension is at different angles in different places. Where will its y component be mg? No, the tension will keep changing. Often...

First, think about the equilibrium position. Can you draw that? Clearly the centre mass will keep descending as long as it is above...

It is the model everyone uses, e.g...

The effect of a force F on a mass m in time ##dt## is to accelerate it by ##dv=F\cdot dt/m##. If instead the force is ##F-dF## then the...