Mechanics (Vertical Motion)

Two identical balls A and B are released from the roof of a building. Ball A is released 1,0 seconds before ball B. Ignoring air resistance, when ball B is released …
a. ball A has traveled 10 m
b. ball A is moving downward at 10 m/s
c. ball A has a mechanical energy greater than ball B
d. ball B has a mechanical energy greater than ball A
e. ball B has a greater acceleration than ball A