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.

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

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

N similar slabs of cubical shape of edge b are lying on ground. Density of material of slab is p. Work done ot arrange them one over the other is -

A rod of mass m and length l is lying on a horizontal table. Work done in making it stand on one end will be

Three identical rods, each of mass m and length l , form an equaliteral triangle. Moment of inertia about one of the sides is

A uniform rod of length 4 m and mass 20 kg is lying horizontal on the ground. The work done in keeping it vertical with one of its ends touching the ground, will be -

Four bodies each of mass m are placed at the different corners of a square of side a. find the work done on the system to take any one budy to infinity.

A uniform rod of mass 2kg and length l is lying on a horizontal surface. If the work done in raising one end of the rod through an angle 45^(@) is 'W' , then the work done in raising it further 45^(@) is

A bicycle chain of length 1.6 m and of mass 1 kg is lying on a horizontal floor. If g = 10 ms^(-2) , the work done in lifting it with one end touching the floor and the other end 1.6 m above the floor is