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Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?