rod在物理中的意义an object with one dimension small in comparison with another(such as a metre or a beam) can be modelled as rod.This means that the mass of the object can be considerdto be distributed along a straight line,A rod has no thickn

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rod在物理中的意义anobjectwithonedimensionsmallincomparisonwithanother(suchasametreorabeam)canbemodelledasro

rod在物理中的意义an object with one dimension small in comparison with another(such as a metre or a beam) can be modelled as rod.This means that the mass of the object can be considerdto be distributed along a straight line,A rod has no thickn
rod在物理中的意义
an object with one dimension small in comparison with another(such as a metre or a beam) can be modelled as rod.This means that the mass of the object can be considerdto be distributed along a straight line,A rod has no thickness(it is one-dimensional) and is rigid(it does not bend or buckle)
上面是解释,rod是“刚体”吗?能否大概解释一下这段话的意思~

一维（如米或梁）比较小的对象，可以模拟杆。这意味着物体的质量可以是considerdto沿一条直线分布，一杆没有厚度（这是一维），是刚性的（它不会弯曲或扣）

金属棒

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