Four Fundamental Interactions

Make two groups: one of supporters of gravitation (Newtonians) and one of electromagnetism (Coulombians). Take hold of the ropes and try to pull the indicator to your side. You can fix the rope at different positions and select a different ratio of the forces. Modern science knows only four fundamental forces: gravitational, electromagnetic, weak nuclear and strong nuclear. The former two are termed far-reaching, while the latter two have an extremely short reach.