Three identical spheres, each having a charge q and radius R. are kept in such a way that each touches the other two. The magnitude of the electric force on any sphere due to the other two is

Thee uniform spheres each having a mass M and raius a are kept in such a way that each touches the other two. Find the magnitude of the gravitational force on any of the spheres due to the other two.

Three uniform spheres each of mass m and diameter D are kept in such a way that each touches the other two, then magnitudes of the gravitational force on any one sphere due to the other two is

Three uniform spheres, each having a mass M=5kg and radius a=2.5m are kept in such a way that each touches the other two. Find the magnitude of the gravitational force in GN on any of the spheres due to the other two.

Three uniform spheres, A, B and C each of mass M and radius R are kept in such a way that each sphere touches the other two. What is the magnitude of the gravitational force acting on A due to B and C ?

Three point charges q are placed at three vertices of an equilateral triangle of side a. Find magnitude of electric force on any charge due to the other two.

Two metal spheres each of radius r are kept in contact with each other. If d is the density of the material of the sphere,then the gravitational force between those spheres is proportional to

Three identical spheres each of mass m and radius R are placed touching each other so that their centres A,B and C lie on a straight line. The position of their centre of mass from centre of A is

If two identical spheres having charge 16 mu C and -8 mu C are kept at certain distance apart , then the force if F. They are touched and again kept at the same distance , the force becomes.

If two identical spheres having charge 16muC and -8mu C are kept at certain distance apart, then the force is F. They are touched and again kept at the same distance, the force becomes

Three identical spheres each of radius 'R' are placed on a horizontal surface touching one another. If one of the spheres is removed, the shift in the centre of mass of the system is.