英语翻译1 the change in position of a body relative to others is called mechanical motion2 the point with mass an object is replaced by is called a mass point 3when we describe the motion of an object,any other object chosen as a reference is cal
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![英语翻译1 the change in position of a body relative to others is called mechanical motion2 the point with mass an object is replaced by is called a mass point 3when we describe the motion of an object,any other object chosen as a reference is cal](/uploads/image/z/11536436-20-6.jpg?t=%E8%8B%B1%E8%AF%AD%E7%BF%BB%E8%AF%911+the+change+in+position+of+a+body+relative+to+others+is+called+mechanical+motion2+the+point+with+mass+an+object+is+replaced+by+is+called+a+mass+point+3when+we+describe+the+motion+of+an+object%2Cany+other+object+chosen+as+a+reference+is+cal)
英语翻译1 the change in position of a body relative to others is called mechanical motion2 the point with mass an object is replaced by is called a mass point 3when we describe the motion of an object,any other object chosen as a reference is cal
英语翻译
1 the change in position of a body relative to others is called mechanical motion
2 the point with mass an object is replaced by is called a mass point
3when we describe the motion of an object,any other object chosen as a reference is called a reference system
4 displacement is an objects total change in pasition
5 distance has only magnitude while displacement has both magnitude and drection
英语翻译1 the change in position of a body relative to others is called mechanical motion2 the point with mass an object is replaced by is called a mass point 3when we describe the motion of an object,any other object chosen as a reference is cal
1:机械运动是相对于其他物体的运动
2:以有质量的点代替了物体就是质点
3:当描述物体运动时,被选作参考的物体就是参考系
4:位移就是物体改变了他的位置
5:长度只有大小,而位移既有大小又有方向