1．四种基本力 (1)引力自然界中的每一个粒子都会因自身的质量或能量而感受到引力．引力比电磁力、弱核力、强核力都弱得多． (2)电磁力电磁力是四种基本力中第二强的力．它作用于带电粒子之间,不和不带电的粒子相互作用．它比引力强得多——两个电子之间的电磁力比引力大约大1042倍． (3)弱核力(弱相互作用) 1. Four Basic Forces (1) Gravity Every particle in the natural world experiences gravity due to its own mass or energy. Gravity is much weaker than electromagnetic force, weak nuclear force, and strong nuclear force. (2) Electromagnetic force The electromagnetic force is the second strongest of the four basic forces. It acts between charged particles and does not interact with uncharged particles. It is much stronger than gravity - the electromagnetic force between two electrons is about 1042 times greater than gravity. (3) Weak nuclear force (weak interaction)