Final answer:
If one magnet is replaced with a stronger one, both magnets still experience equal and opposite forces due to Newton's third law, despite the increased strength of the magnetic field of the more powerful magnet. The repulsive magnetic forces between like poles of magnets increase in magnitude, but they remain equal for both magnets involved in the interaction.
Step-by-step explanation:
When two identical magnets repel each other with equal strength, they are experiencing what is known as a magnetic repulsive force.
If you replace one of these magnets with a stronger magnet, the magnetic repulsive force experienced by both magnets will remain equal but will increase in magnitude due to the stronger magnet's higher magnetic field. This is because according to Newton's third law of motion, for every action there is an equal and opposite reaction. Hence, if the stronger magnet exerts a greater repulsive force, the original magnet will also exert an equal force back on the stronger magnet.
The size or strength of the magnet affects the magnitude of the force produced, but it does not alter the fact that the forces will be equal on both magnets. The magnetic field does decrease with distance, which aligns with our experiences with magnets; the further apart they are, the weaker the force of attraction or repulsion.
The mechanism for magnetic force interaction between magnets is related to their magnetic fields, which are a result of moving charges within the material. These fields exert forces on other magnets depending on the alignment of their poles. When like poles face each other (both north or both south), the field lines repel, resulting in a repulsive force. When opposite poles face each other, the field lines attract, leading to an attractive force.