Both tech a and tech b are correct
Confirming the statement of tech a:
Yaw angle is defined as the angle between the pointing line in the movement of car direction in which it is pointed.
Yaw angle describes the car rotation about vertical axis which is about y-axis. It is the angle between the axis parallel to the vehicle surface in fixed-earth coordinate system.
Yaw then describes a vehicle deviating from a straight path. Hence tech a is correct.
Confirming the statement of tech b:
In high speeds, vehicles tends to tip over. This is angular displacement of vehicle about its longitudinal axis.
When a vehicle tips over, then its weight is thrown out to the outside of corner which results into rolling of the vehicle.
Therefore, when the moving vehicle is turned to the left, then the driver throws to the right. Similarly, when the vehicle turns to the right, then the driver throws to the left which results into rolling of front wheel, causing the front of the vehicle to nose down or rise up.
Hence, tech b is correct.
Learn more about yawing and rolling of vehicles here:
https://brainly.com/question/9337857
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