Recent content by hatephysics

solved. thank you guys so much.

solved. thank you guys so much.

Thank You for the reply. I have tried this method before, but I am not sure how they end up with I=(2/5)(R^5-R^5)/(R^3-R^3). I am just using (2/5)(M)(R^2)-(2/5)(M)(R^2) (the two radii are different)

1. Derive the moment of inertia of a sphere with thick walls.Homework Equations I=(.5)(M)(R^2+R^2) ? one is for the inner radius the other is for the outer radius. The Attempt at a Solution I believe this can be found by integrating a series of infinitely thin cylinders with different size...

Well, I tried using an arbitrary case and my new answer is "no" but I still don't quite get why. In my case, I designated the radius to be multiplied by 4 and the angular momentum to be multiplied by .5

I guess the lead one would because of the greater inertia, but what about the case with different radii. The way I see it is, they both follow .5I(omega)^2 so the larger cylinder will have a larger radius but a small angular velocity. But, tangential velocity is multiplying both radius and...

Homework Statement If two cylinders have the same rotational energy, do the cylinders, though having either different radii or different masses, have the same tangential velocity?Homework Equations Rotation Equations (torque, etc)The Attempt at a Solution My gut feeling says yes, because of the...

Thank You for taking the time to reply. But, I still don't quite get this. Wouldn't the friction cause the cylinder to have less energy and, therefore, a slower cylinder rotation and a slower translational velocity? Maybe, it is because I don't quite understand rotations involving objects...

solved. thank you