Final answer:
The force required to initiate the movement of the book on the desk is zero, and the force required to maintain its constant speed once it begins moving is also zero.
Step-by-step explanation:
What force is required to initiate the movement of the 2.03 kg book on the desk?
The force required to initiate the movement of the book is equal to the force of friction between the book and the desk. According to Newton's second law, force (F) equals mass (m) multiplied by acceleration (a). Since the book is initially at rest, the acceleration is zero. Therefore, the force required to initiate the movement is also zero. So, none of the given options (A, B, C, D) are correct for this case.
What force is required to maintain the book's constant speed once it begins moving?
Once the book begins moving, it experiences a constant speed. This means that there is no net force acting on the book. According to Newton's first law of motion, an object will continue moving at a constant velocity unless acted upon by an external force. Therefore, the force required to maintain the book's constant speed once it begins moving is also zero. None of the given options (A, B, C, D) are correct for this case as well.