Note the Physics

• The acceleration vector is in the direction of the vector sum of the two forces, in accordance with Newton's 2nd Law. (Think parallelogram addition.)
• There is no force in the direction of the velocity in this motion.
• Generally, the velocity is not in the direction of the acceleration, or of either force.
• The acceleration can get quite large when an object moves quickly around a curve -- the wire must exert a large normal force to cause a fast-moving bead to change its direction.