Answer:
The normal force is the force that the floor does as a reaction of the gravitational force that an object does against the floor (is the resistance that objects have when other objects want to move trhough them, and the force comes by the 3rd Newton's law, and this is specially used in cases where the first object is fixed, like walls or the floor). With this in mind, the point in where the normal force will be greater is the point that is closer to the center of mass of the object (the point with more mass)
If the wheels are in the extremes of the object, and the center of mass is in the middle of the object, the normal force will be equal. Now if for example, you put a little mass in one end of the object, now the center of weight displaces a little bit and is not centered, and the side is where you put the weight on will receive a bigger normal force from the floor than the other side.
The normal force between the floor and the front wheels are dependent on the center of mass of object. Therefore, its value varies according to the position of center of mass.
The given problem is based on the concept of normal force. The normal force is the force that the floor does as a reaction of the gravitational force that an object does against the floor.
If the wheels are in the extremes of the object, and the center of mass is in the middle of the object, the normal force will be equal.
For example, putting a little mass in one end of the object, the center of weight displaces a little bit and is not centered, and the side is where the weight will receive a bigger normal force from the floor than the other side.
Thus, we can conclude that the normal force between the floor and the front wheels are dependent on the center of mass of object.
Learn more about the center of mass here:
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