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HIGH SCHOOL

Mathematics

Concept Videos

Calculus

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Vectors in Space

Cable Tension and Force Balance

Description

Cable tension and force balance are shown with a steel beam held by two identical cables. The beam has a downward weight of 5000 N. The cables support it from opposite sides. Because the setup is symmetric, each cable makes a 60° angle with the horizontal beam and carries the same tension.

The be...

Transcript

一根重5000牛顿的钢梁由两根完全相同的无质量缆绳吊起。目标是求出使钢梁保持平衡时每根缆绳中的张力。

平衡意味着横梁保持静止状态,且水平方向和竖直方向的合力均为零。该装置具有对称性,每根缆索与水平横梁的夹角均为六十度。

每根电缆中的张力是一个沿电缆方向作用的矢量。

由于每根缆绳均施加拉力 xy 方向上,每个张力均通过单位矢量分解为水平和垂直分量 i j.

梁的重量沿负j方向向下作用。为达到平衡,两根缆索的张力必须平衡该重量,因此它们的矢量和等于重量矢量的反向量。

比较水平分量...