Newton - the unit to measure force, Force - is a push or a pull on an object., Net force - the sum of all forces acting on an object., Balanced force - forces that have a net force of zero netwons., Unbalanced force - what will make an object to move.,

force

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？