Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that mass doesn't directly affect the law itself, but it does influence how the forces are experienced.

Let's break it down:

* The forces are always equal and opposite: No matter the masses involved, the forces acting on two objects will always be equal in magnitude and opposite in direction. This is the core of Newton's Third Law.

* Mass affects acceleration: While the forces are equal, the acceleration experienced by each object will be different if their masses are different. This is due to Newton's Second Law (F = ma). A larger mass will experience less acceleration for the same force.

Example:

Imagine a small car colliding with a large truck. The car exerts a force on the truck, and the truck exerts an equal and opposite force on the car. However:

* The car will experience a much larger acceleration (deceleration) due to its smaller mass.

* The truck will experience a smaller acceleration due to its larger mass.

In essence, mass doesn't change the fundamental principle of Newton's Third Law, but it affects the consequences of the interaction. The forces remain equal and opposite, but the resulting accelerations differ based on the masses involved.