The ball has the greatest potential energy when it reaches the top of its flight. Option C is correct.
The potential energy of a body or object is due to its position. The ball has the greatest potential energy when it reaches the highest point.
[tex]U = mgh[/tex]
Where,
[tex]U[/tex] - potential energy
[tex]m[/tex] - mass
[tex]g[/tex] - gravitation acceleration
[tex]h[/tex] - height
Since the mass and gravitation acceleration is constant hence potential energy will be directly proportional to the height of the ball.
Therefore, the ball has the greatest potential energy when it reaches the top of its flight.
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