In a tyre axis system as defined by Society of Automotive Engineers, the moment acting about z-axis is called
Options:
(A) aligning torque
(B) over turning torque
(C) rolling resistance moment
(D) lateral moment
Official Answer Key:
A
Step-by-Step Solution & Explanation
In the SAE tyre-axis system, the axes are defined as: x (longitudinal), y (lateral) and z (vertical, perpendicular to the road, positive downward). The moment about the x-axis is the overturning moment, about the y-axis is the rolling-resistance moment, and the moment about the z-axis (the vertical axis) is the aligning torque, which tends to steer/align the tyre about its vertical axis. This matches (A).
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