Why Is the Acceleration Not Zero at the Highest Point of a Thrown Baseball?

[demonelite123]

A baseball is thrown upwards. What is the acceleration at the highest point?

i thought the acceleration would be 0 since velocity at the highest point is 0 and the derivative of velocity is acceleration. Since velocity is not changing, shouldn't acceleration be 0?

However the answer is supposed to be 9.8 m/s^2 downwards. why is the answer the acceleration of gravity and not 0?

 

[LowlyPion]

A baseball is thrown upwards. What is the acceleration at the highest point?

i thought the acceleration would be 0 since velocity at the highest point is 0 and the derivative of velocity is acceleration. Since velocity is not changing, shouldn't acceleration be 0?

However the answer is supposed to be 9.8 m/s^2 downwards. why is the answer the acceleration of gravity and not 0?

Velocity at the top is 0. But the rate of change is still 9.8 m/s² until it hits something, right?