Ball thrown upwards: Acceleration and Velocity

AI Thread Summary
When a baseball is thrown upwards, it reaches a point at the peak of its trajectory where its velocity is zero, as it momentarily stops before descending. However, the acceleration due to gravity remains constant throughout the motion, meaning there is no point where acceleration is zero. The ball's velocity decreases as it ascends and increases as it descends, influenced by the gravitational force acting on it. Understanding these concepts is crucial for solving related physics problems. The discussion emphasizes the distinction between velocity and acceleration in projectile motion.
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Hello, all! I was searching online for help w/ my Physics homework and I stumbled upon this website. New member here (:

1. Homework Statement
A baseball is thrown directly upwards.
a. Is there a point on the trajectory where the ball has zero velocity? Explain.
b. Is there a point on the trajectory where the ball has zero acceleration? Explain.

Homework Equations


velocity = displacement/time
acceleration = velocity/time
force = mass x acceleration

The Attempt at a Solution


So I've gotten to the point where I've figured that the velocity is constantly decreasing due to the force of gravity, and that the acceleration is negative and also stays constant. However, I'm really struggling in answering the question pertaining to points of ZERO v/a and putting this in words (that actually make sense). Help would be much appreciated!

Thanks!
 
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What goes up must come down.

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