n' identical cubes each of mass 'm' and edge 'L' are on a floor. If the cubes are to be arranged one over the other in a vertical stack, the work to be done is

Identical cubes each of mass 'm' and side T' are on the horizontal surface.Then the minimum amount of work done to arrange them one on the other is

If n number of identical cubes, each of mass m and side a lying on level ground. Find the work done in piling them one above the other.

A meter scale of mass 400 gm is lying horizontally on the floor. If it is to be held vertically with one end touching the floor, the work to be done is

Four identical spheres each of mass M and radius R are placed on the vertices of a square of edge L . Find the M.I. about an axis ( a ) coinciding with the side of a square and ( b ) coinciding with the diagonal of a square.

Four identical particles each of mass m are arranged at the corners of a square of side length L . If one of the masses is doubled, the shift in the centre of mass of the system. w.r.t. diagonally opposite mass

Six identical particles each of mass m are arranged at the corners of a regular hexagon of side length L . If the mass of one of the particle is doubled, the shift in the centre of mass is

When a torch is pointed towards one of the vertical edges of a cube, you get a shadow of cube in the shape of