Final answer:
The y-component of vector &vec;f A) cannot be determined without additional information because the necessary details about the vector's magnitude and direction are not provided.
Step-by-step explanation:
To determine the y-component of a vector, additional information about the vector's direction and magnitude is necessary. Given the information provided, we are unable to determine the exact y-component of vector &vec;f because the specific numeric value or direction (positive or negative along the y-axis) isn't mentioned. Therefore, the correct answer to the question of what the y-component of vector &vec;f is would be A) It cannot be determined without additional information. It's important to distinguish between the unit of force, newtons (N), and the normal force symbol, also N when considering forces and their components in physics problems.