Understanding the Physics of Thrown Balls: Speed, Velocity, and Acceleration

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When a ball is thrown vertically upward, it reaches a maximum height where its velocity and speed are zero. However, acceleration is not zero at this point; it remains constant at approximately 9.8 m/s² due to gravity. The downward acceleration is what causes the upward velocity to decrease until it reaches zero. Thus, while both velocity and speed are zero at maximum height, acceleration continues to act on the ball. Understanding these distinctions is crucial in physics discussions about motion.
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A ball is thrown vertically upward. Consider the following quantities: 1)speed, 2)velocity and 3) acceleration. Which of these will be zero when the ball has reached the maximum height?

Won't all three be zero?
 
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Acceleration is never 0 on Earth...
Think about it this way, it's BECAUSE of the acceleration that the velocity & speed have become 0... 'cause the ball was moving up with some positive velocity along the y axis, and the acceleration acts downwards and thus reduces it.
 
I see...so the velocity and speed are 0 at the max height, but the acceleration is always 9.8m/s^2?
 

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