The motion diagram shown in the figure represents a pendulum released from rest at an angle of 45 from the vertical. The dots in the motion diagram represent the positions of the pendulum's bob at eleven moments (labeled 0 through 10) in time; the black arrows between adjacent dots (moments) represent the average velocities. Equal time intervals separate the dots. Also given is a "compass rose" in which directions are identified by letters of the alphabet.
1) What is the acceleration's direction at moment 5? Reference the compass rose and enter the letter that identifies the direction of, the velocity change. Enter Z if the acceleration vector has zero length.
2) What are the directions of the bob's accelerations at moments 0 and 10? Reference the compass rose and enter the letters that identify the directions of the accelerations at moments 0 and 10 separated by a comma. Enter Z if an acceleration vector has zero length.
