Does a spinning uniform object which is losing mass experience a change in angular velocity? It seems to me the angular momentum changes due to a change in the moment of inertia of the object, which depends on mass. The angular momentum of the object would decrease, if we just look at the object alone (L=Iw). So there is some torque since change in L implies a torque. But then that also means an angular acceleration so that w is not constant. The answer given is that angular velocity for the object is constant. Why?