Hi All, I don't know whether this question makes any sense or not anyhow i will ask. For example, consider a ball which is attached at the end of the string and let us assume that this ball rotates in the uniform circular motion. Then the reason it rotates in uniform circualar motion is its tangential velocity and radial accelaration(ie perpendicual component of accln). Now consider a rigid body which rotates with constant angualr velocity about the fixed axis. My question is what makes the rigid body to rotate about the fixed axis?? kindly explain me.