Can you think of two particles which do not exert gravitational force on each other?

What is called maximum distance for which the molecules can exert attraction force on each other ?

Two stationary particles of masses M_(1) and M_(2) are at a distance d apart. A third particle, lying on the line joining the particles experiences no resultant gravitational forces. What is the distance of this particle from M_(1) .

A particle of mass m is placed at each vertices of equilateral triangle. If the particle of 5 kg is placed at the centroid of triangle, then find the gravitational force on it. The distance between centroid to vertice is 2 m.

In the wave propagation phenomenon, phase difference of oscillation of two particles having distance à from each other is ......

A particle of mass m was transferred from the centre of the base of a uniform hemisphere of mass M and radius R into infinity. What work was performed in the process by the gravitational force exerted on the particle by the hemisphere?

Two solid sphere of same size of a metal are placed in contact by touching each other prove that the gravitational force acting between then is directly proportional to the fourth power of their radius.