What is a torque?

Torque is defined as a turning force that causes an object to rotate around an axis. It is the effect of a force that is applied at a distance from a pivot point or an axis of rotation. The magnitude of torque depends not only on the amount of force applied but also on the distance from the pivot point to the line of action of the force, as well as the angle at which the force is applied.

In nanotechnology and engineering applications, understanding torque is crucial since it impacts how machinery operates and how forces are transmitted through mechanical structures. When you exert a force with a wrench to loosen or tighten a bolt, you are applying torque; the further you are from the bolt (like using a longer wrench), the more torque you can apply with the same amount of force. This concept is essential in many areas, including physics, engineering, and everyday mechanical activities.