Physics, Net Torque (5 of 13) Five Forces Applied to a Door

Shows how to calculate the torque from 5 different forces that are applied to a door. Examples will be shown for forces that are and are not at applied at a right angle to the door.

Torque is a rotating force. It is a measure of how much force is acting on an object that causes the object to rotate. The object will rotate about an axis, which is called the pivot point. It is labeled with the letter P or O. The distance from the pivot point to the point where the force acts is called the moment arm or the lever arm. This distance is labeled with the letter r. This distance r is also a vector, and points from the axis of rotation to the point where the force acts. The force is labeled with the letter F.

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