A system consits of n identical particles each of mass m. The total number of interactions between particles possible are :

A system consists of n identical particles each of mass m. The total number of interaction potential energy terms possible are (n(n-1))/x . Find value of x.

A system consists of n identical particles each of mass m. The total number of interaction potential energy terms possible are (n(n-1))/x . Find value of x.

A system consists of two identical particles one particle is at rest and the other particle has an acceleration .a.. The centre of mass if the system has an acceleration of

What is the total momentum of the system of particle?