Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
1) it has the same position and velocity as ball B.
2) it has the same position and acceleration as ball B.
3) it has the same velocity and acceleration as ball B.
4) it has the same displacement and velocity as ball B.
5) it has the same position, displacement and velocity as ball B.
Answer: 2