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> Good one, chap! How about you argue with substance instead ... Considering they were replying to a post that was, effectively, arguing "nuh uh!", their respo
by RHSeeger 2y ago
> Good one, chap! How about you argue with substance instead ...
Considering they were replying to a post that was, effectively, arguing "nuh uh!", their response seems reasonable.
> Explain, what makes the ball suddenly start rolling down the dome?
That's _literally_ the entire point. Nothing does. There is nothing that causes the ball to start rolling. But the Newtonian laws of physics indicate it will.
- Certhas 2y agoNitpick: Indicate it can. Not that it will.
- ajross 2y ago> But the Newtonian laws of physics indicate it will. Pedantically: they indicate it can. The situation where the ball spontaneously starts rolling[1] at any specific moment in time, without any application of force or interaction with any other part of the system, are perfectly legal and well-defined by the laws of motion. They just can't be predicted determinically. [1] FWIW it's not even a ball in this case, as the rotational mechanics of a sphere with non-zero moment of inertia would destroy the very carefully constructed function required for the potential energy field.