pöördemomendist

Pöördemoment, often translated as torque, is a twisting force that tends to cause rotation. It is a vector quantity, meaning it has both magnitude and direction. The magnitude of the torque is determined by the force applied and the distance from the pivot point or axis of rotation to the point where the force is applied. Mathematically, torque ($\tau$) is calculated as the cross product of the position vector ($\mathbf{r}$) from the pivot to the point of force application and the force vector ($\mathbf{F}$): $\tau = \mathbf{r} \times \mathbf{F}$.

The SI unit for torque is the newton-meter (Nm). In some contexts, particularly in the United States, the pound-foot (lb-ft) is also used. It is important to distinguish torque from work or energy, as torque represents the rotational equivalent of linear force. A larger torque will produce a greater angular acceleration for a given rotational inertia.

Pöördemoment plays a crucial role in various mechanical systems. In engines, it is the rotational force that drives the wheels. In tools like wrenches, applying force at a greater distance from the bolt's center creates more torque, making it easier to tighten or loosen. Understanding pöördemoment is fundamental to the design and analysis of machinery, vehicles, and many other engineered devices.