How do magnetic forces repel or attract?
plz make it as simple as possible

In magnets the molecules are uniquely arranged so that their electrons spin in the same direction. This arrangement of atoms creates two poles in a magnet, a North-seeking pole and a South-seeking pole. The magnetic force in a magnet flows from the North pole to the South pole.so if there both south or both north the atoms can’t flow through causing them to stop flowing

Good luck

The masses of the objects and their densities