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Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis, which we will call the pivot point, and will label 'O'. We will call the force 'F'. The distance from the pivot point to the point where the force acts is called the moment arm, and is denoted by 'r'.
Torque is the tendency of a force to produce a rotation around an axis. In this experiment we will examine the clockwise and counterclockwise torque of a meter stick balanced on a fulcrum. There is a filming error in this copy of the video. I state that you need 10% error or less and the lab clearly shows 5% error.