Question

Consider a gravity-free hall in which a tray of mass M,carrying a cubical block of ice of mass m and edge L,is at rest in the middle (figure 9-E4).If the ice melts,by what distance does the centre of mass of "the tray plus the ice" system descend ?

Answer 1

As there is gravity free,after the ice melts,it would tend to acquire a spherical shape.But,there is no external force acting on the system.So,the centre of mass of the system would not move.