How to decide if a torque is positive or negative?
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Use Right hand thumb rule.
or Right handed coordinates.
if you take your right hand in such a way that your fingers represent the radius then curl your fingers inside palm (where perpendicular to the palm is force) then the direction represented by thumb will be positive.
In right handed coordinates
if +X axis represents Radius and +Y axis represents the Force then +Z axis will represent the direction of Torque.
or Right handed coordinates.
if you take your right hand in such a way that your fingers represent the radius then curl your fingers inside palm (where perpendicular to the palm is force) then the direction represented by thumb will be positive.
In right handed coordinates
if +X axis represents Radius and +Y axis represents the Force then +Z axis will represent the direction of Torque.
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