Ball A (thrown upwards):

• Initial upward motion: Ball A will initially move upwards, slowing down due to gravity.
• Reaching maximum height: It will reach a maximum height where its velocity momentarily becomes zero.
• Falling down: After reaching its peak, Ball A will fall downwards, accelerating due to gravity.
• Velocity at release point: When Ball A passes the point from which it was released, its velocity will be V downwards (the same speed it was initially thrown upwards with, but in the opposite direction).

Ball B (thrown downwards):

• Downward motion: Ball B is immediately accelerated downwards by gravity.

Comparison:

• Velocity at release point: When ball A reaches its initial release point on the way down, both balls A and B will have the same velocity of V downwards.
• Simultaneous Motion: From this point onward, both balls experience the same acceleration due to gravity and travel the same distance.
• Impact: Therefore, both balls A and B will hit the ground simultaneously and with the same speed.