Trucks are more likely to roll than skid when travelling too quickly through a curve/corner (unlike cars). The trailer tips first due to the high centre of gravity (relative to the prime mover). Trailers can roll with an incline of as little as 15 degrees while the prime mover will only rollover if the incline is more than 60 degrees.
Contributing factors: speed, turning radius, centre of gravity, load transfer, vehicle features.
Side force = weight x lateral acceleration
Vertical force holding truck to road = weight x gravitational acceleration
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