I've read a lot and watched a lot about lenz's law , about how a magnet moving towards a solenoid will experience an opposing force. But I tried to search how to calculate this force , found nothing . So i tried to find how to calculate force between 2 magnets . Found on wikipedia how to calculate force between 2 magnetized areas, 2 cylindrical magnets and 2 dipoles ( very basic , resembling coulombs law). So , which one should i use when calculating force between solenoid and the cylindrical magnet moving towards it ?