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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 twisting force that tends to cause rotation. The point where the object rotates is known as the axis of rotation. Mathematically torque can be written as T = F * r * sin(theta) , and it has units of Newton-meters.When the sum of all torques acting on an object equals zero it is in rotational equilibrium.hile often heard as an automotive term, torque is actually a general physics term that has many applications. Torque is defined as a twisting force that tends to cause rotation. We call the point where the object rotates the axis of rotation.