Question

We say that interaction of two objects are necessary for a force to come into play. In the other hand we say that non-contact forces can come into play even the objects are not in contact. Interaction is required for a force to come into play or not?

Answer 1

An interaction of one object with another object results in a force between the two objects .

In other words, A force will arise due to interaction between two objects.If there is no interaction between two objects , no force can show it's effect.

At least two objects must interact for a force to come into play. Thus, an interaction of one object with another object results in a force between the two objects and no physical contact is necessary.