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Force System Resultants

Torque from a Couple: Solving Forces

Description

The moment of a couple is a key physics and engineering idea for finding torque, or rotational force. A couple is made of two equal and opposite forces that act on an object. When those forces work together, they create a twisting effect that can rotate the object.

The moment of a couple is calcu...

Transcript

考虑一个三维坐标系中,在 x 轴上点 O 处连接有接头的管道。

两把长度为 0.12 米的扳手沿 z 轴施加大小相等、方向相反的 120 牛顿力。这两把扳手沿 x 轴距离点 O 分别为 0.5 米和 0.7 米。

确定该系统的力偶矩。

关于点 O 的力偶矩由位置矢量与作用力的叉积之和确定。

rA 和 rB 分别表示从点O 指向点AB 的位置矢量。

位置矢量 rA