Correct: are an interaction between matter, are a push or pull, transfer energy, can change the motion of an object, act on all matter all the time, can be contact or noncontact, can be measured, are affected by mass, Incorrect: are Not measurable, are a form of energy, are matter, are the same as mass, cannot be measured, only occur between two objects touching, never change the motion of an object,

Forces

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？