Force interaction refers to the way objects influence each other's motion through forces. When two objects come into contact or are in proximity, they exert forces on each other, which can cause changes in speed, direction, or shape. This interaction is fundamental in understanding how objects behave in the physical world. There are different types of force interactions, such as gravitational force, friction, and electromagnetic force. Each type plays a crucial role in various phenomena, from the falling of an apple due to gravity to the resistance felt when sliding an object across a surface due to friction. Understanding these interactions helps explain everyday occurrences and complex systems alike.