Final answer:
According to the right-hand rule, a positive charge moving vertically upwards into a magnetic field directed north will experience a magnetic force to the east.
Step-by-step explanation:
The question relates to the direction of the magnetic force on a positively charged particle when it enters a magnetic field. According to the right-hand rule for magnetic forces, the force on a positive charge moving in a magnetic field is perpendicular to the direction of motion and the magnetic field. Since the positive charge is moving vertically upwards and the magnetic field is directed toward the north, the force will point to the east, as determined by the right-hand rule, where the thumb points in the direction of the charge's velocity (up), the fingers point in the direction of the magnetic field (north), and the palm points towards the direction of the force (east) for a positive charge.