Question

in any problems involving circular motion, which way does the acceleration vector point?
in a direction perpendicular to the circumference of the circle
in a direction tangential to the circumference of the circle
in a direction pointing toward the center of the circle of motion

Explanation:

En el movimiento circular, la aceleración que cambia la dirección de la velocidad es la aceleración centrípeta, que apunta hacia el centro del círculo de movimiento.

Answer:

In a direction pointing toward the center of the circle of motion