Can torque only be caused by a force couple?

[Voliminal]

Is it necessary that torque can only be caused by a force couple? If not, then can you provide examples?

 

[D H]

This looks like homework.

You need to show some work on the problem before we can help you.

 

[Studiot]

What do you understand torque is?

 

[rcgldr]

A "force couple" implies that there are multiple forces acting upon an object but no net linear force on an object. Is this what you mean by "force couple"?

 

[rdl]

Torque is a measure of the rotational force or moment applied to an object. It can be caused by a single force or a combination of forces acting on an object. While a force couple, which consists of two equal and opposite forces acting in parallel but not in the same line, is one way to produce torque, it is not the only way.

Torque can also be produced by a single force acting at a distance from the axis of rotation, known as a moment arm. For example, when you open a door, you are applying a torque to the door handle by pushing on it at a distance from the hinge.

Another example is a wrench turning a bolt. The force applied by the wrench to the bolt creates a torque, even though there is no force couple involved.

Therefore, it is not necessary that torque can only be caused by a force couple. It can also be caused by a single force or a combination of forces acting at a distance from the axis of rotation. This is important to understand in various fields of science, such as mechanics, engineering, and physics, where torque plays a crucial role in analyzing and designing systems.