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You are sitting in the driver's seat of a parked automobile. You are told that the forces exerted upward by the ground on each of the four tires are different. Discuss the factors that enter into a consideration of whether this statement is true or not.
When there is no driver in the automobile one would expect the normal forces exerted by the ground, on the tires to be the same. However, when the driver seat is occupied, the center of mass of the system shifts such that the push from the tire near the driver seat is relatively larger than the one is the rear.This shift can be accounted for different push on the ground from different tires. The reaction to these pushes is provided by the ground which can be seen in different reaction forces on each tire.Therefore the statement is true only when the center of mass of the automobile is at the geometric center.
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