 All right, friends. So here is a question on rigid body dynamics. Let's see what it's about, OK? So a solid sphere is there, a hollow sphere, and a ring. So you have three objects that are released from the top of inclined plane, that is sectionless, so that they can slide down the plane. Then the maximum acceleration down the plane is hot, and the bracket is written no rolling. Now you can see that when these objects move on an inclined plane, let's say this angle is theta, OK? And here is, let us say, this is a ring, let's say, OK? Now the forces acting on it will be what? There will be a normal reaction, OK? That will pass to the center. There will be a object, OK? So only these two forces are acting on this object. There is no friction, OK? And both the forces are passing through the center of mass of this object, OK? So talk about center of mass will be equal to 0, because force is passing through the center of mass, OK? And this should also be equal to moment of inertia towards center of mass into alpha, OK? So this gives us alpha is equal to 0, fine? At the same time, if I resolve the forces, let's say I will resolve along the inclined, this becomes Mg sine theta, and perpendicular to inclined will become Mg cos theta, OK? So along the inclined sine theta, that is the only force. This should be equal to M into A, OK? So A will become equal to G sine theta. See that it is independent of mass. It is independent of the fact that it is a sphere, a cylinder, or a ring, OK? Hence, since there is no friction of all these objects will be this only, and all of them will be having the same acceleration, OK?