Force
Forces arise from interactions between objects, or between an object and a field. There are just four distinct ways in which particles can interact, giving rise to four distinct types of force. The four fundamental interactions are:
- gravitational (which acts between all matter)
- electromagnetic (includes electrostatic and magnetic forces)
- strong (very short range, acts between subatomic particles)
- weak (very short range, acts between subatomic particles)
Generally, two objects can interact with more than one of these forces. Only the gravitational and electromagnetic forces are readily perceived in normal life although the strong and weak forces are important for the stability of nuclei.
