Torque: Understanding Direction & Significance

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Torque is expressed as a vector that is perpendicular to the lever, with its direction determined by the right hand rule. This vector does not represent a force but signifies the direction of rotation along the axis of rotation. The direction of the torque vector changes based on the sense of spin, with conventions established for consistency, similar to right-handed and left-handed threaded screws. The torque vector's direction aligns with the axis of rotation, emphasizing its role in indicating rotational movement rather than force. Understanding torque's vector nature is crucial for clarity in physics and engineering applications.
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When expressing torque as a vector, it is perpendicular to the lever (the exact direction is determined by the right hand rule).

But why is it so? this vector can not be a force vector since the angular force that causes the rotation is the force produced to the lever. So what does the direction of the torque signify?
 
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the direction of torque, like the direction of rotation is such a direction that lies alongside the axis of rotation. spin it in one direction and the torque or rotation vector lies alongside the axis pointing one way, spin the other sense and the vector lies alongside the axis pointing the opposite way. which direction of vector that gets associated with which sense of spin is only a matter of convention. just like right-handed threaded screws vs. left-handed threaded screws. they had to pick one and the right hand rule was picked over the left hand rule.
 
The direction of torque signifies just that- the direction of torque.
 
The direction of a torque vector is the axis. It's not a force vector. You'd need to invent the concept of a circular force vector to deal with torque, which would be messy. Using left or right hand rule, the vector direction is the same as the axis of the circular force vector.
 

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