A ball of mass m moving with velocity v collides elastically with another ball of identical mass coming from the opposite direction with velocity 2v. Their velocities after collisions are-

A ball of mass 1kg moving with 4m^-1 along +x-axis collides elastically with an another ball of mass 2kg moving with 6m//s is opposite direction. Find their velocities after collision.

A ball of mass 1kg moving with 4m^-1 along +x-axis collides elastically with an another ball of mass 2kg moving with 6m//s is opposite direction. Find their velocities after collision.

A ball of mass m moving with velocity v collides head on elastically with another identical ball moving with velocity - V. After collision

A ball of mass m moving with velocity v collides head on elastically with another identical ball moving with velocity - V. After collision

A ball of mass M moving with a velocity v collides perfectly inelastically with another ball of same mass but moving with a velocity v in the opposite direction. After collision

A ball of mass m moving with a velocity collides head on elastically with another of the same mass m but moving with a - in the opposite direction). After the collision

A body of mass m, moving with the some velocity v collides with another body of same mass moving with same speed but in the opposite direction, sticks to it. The velocity of the compound body after collision is :