A certain particle undergoes erratic motion. At every point in its motion, the direction of the particle's momentum is always
the same as the direction of its velocity
the same as the direction of its acceleration
the same as the direction of its net force
the same as the direction of its kinetic energy
a. the same as the direction of its velocity
b. the same as the direction of its acceleration
c. the same as the direction of its net force
d. the same as the direction of its kinetic energy