Question

example of isolated system

Answer 1

A system is a collection of two or more objects. An isolated system is a system which is free from the influence of a net external force which alters the momentum of the system. There are two criteria for the presence of a net external force; it must be...

a force which originates from a source other than the two objects of the system
a force that is not balanced by other forces.
A system in which the only forces which contribute to the momentum change of an individual object are the forces acting between the objects themselves can be considered an isolated system.

Consider the collision of two balls on the billiards table. The collision occurs in an isolated system as long as friction is small enough that its influence upon the momentum of the billiard balls can be neglected. If so, then the only unbalanced forces acting upon the two balls are the contact forces which they apply to one another. These two forces are considered internal forces since they result from a source within the system - that source being the contact of the two balls. For such a collision, total system momentum is conserved.

Answer 2

bullet and recoil

Answer 3

rubik has the right idea. collision of an object in a say, box. Is a good example. So long as mommentum is neglected.

Answer 4

THNAKYOU MR ABBOT OF CANTERBURRY

Answer 5

Wait what we are talking about an isolated system, which is just a system where their cannot be energy or mass transfer. An example of this would be an insulated sealed off thermos.

No idea what you are talking about abb0t but to be fair I only read part of your answer