NTesla's latest activity

So, if the mass distribution doesn't change just because the ball is rotating, this means the moment of inertia should not change just...

@haruspex, @kuruman Your opinion on this.

Will the distribution of mass change just because the ball is rotating ?

This I do understand. But let's say, we have a solid sphere which is just lying at the bottom most point of the concave surface. Not...

Since we are taking torque about axis passing point C, and moment of Inertia is only the distribution of mass about axis passing through...

And I'm applying the parallel axis theorem. But apparently, in it's application something other than what I've done in the pdf file, is...

Is the moment of Inertia dependent upon whether a body is actually rotating about some axis or not. Can a body not have moment of...

Yes, if you take the same sense as positive for both, but no law says you have to. If ##\theta## is the angle clockwise from vertical...

Yes, they are as you've written about. Proceeding on the original question to find the time period, my calculation is not giving the...

Let's change the symbols a bit to make things clear. You can view the motion as a pendulum that swings in a circular arc of length...

I still don't fully understand what you meant to say in the last line here. My opinion is: ##\alpha_{cm}## and ##\alpha_{about C}##...

No, ##\Delta s## is greater than that because of the curved surface. Consider e.g. R only marginally greater than r.

yes. kindly see post#17 above.

Agreed. You've mentioned that: we can infer that ##\alpha## is positive for rolling up the slope. I don't think I understand this line...

Here's how I think that equation has been derived. ## \ddot{\theta }## is the angular acceleration about the point C (centre of...