Author:
Randall Dupree

At the end of this lesson, students should be able to define and calculate torque, and use it in real world applications.

Torque is a twist or a force applied off center to an object that causes a rotation. Torque is a vector that is found by using the formula . Where **F** is the applied force and **d** is the displacement from the axis of rotation. Since torque is a vector the direction is important. For maximum torque **F** and **d** should be at 90°. Taking in the direction in to account the torque formula becomes . Where is the angle in between **F** and **d**. Positive torque rotates counter clockwise and negative torque rotates clockwise. In the real word a positive torque will loosen a bolt and negative torque will tighten a bolt.

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