Final answer:
When an object is at the pole, it is accelerating towards the center of the Earth. To maintain the object's apparent weight as mg, the weight force towards the center of the circular path must be slightly less than mg to provide the necessary centripetal force.
Step-by-step explanation:
When an object is at the pole, it is accelerating towards the center of the Earth. To write blank, such that the object's apparent weight is exactly equal to mg, the weight force towards the center of the circular path needs to be slightly less than mg.
This allows the weight force to provide the necessary centripetal force for the object to move in a very large circular path as the Earth rotates.