Two charges +Q and -Q, are separated by distance d an then released. The positive charge has mass m, and the negative charge has mass 2m. Which of the following statements is true?
a. They move with constant and equal velocities.
b. They move with constant velocities, but the velocity of the negative charge is half of the velocity of the positive charge.
c. They move with constant and equal accelerations.
d. They move with constant accelerations, but the accelerations of the negative charge is half of the accelerations of the positive charge.
e. They move with gradually increasing and equal accelerations.
f. They move with gradually increasing acclerations, but the accleration of the negative charge is half of the accleration of the positive charge.