Velocity & Acceleration of Ball Thrown Upward: Perpendicular? Parallel?

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The discussion centers on the relationship between velocity and acceleration vectors of a ball thrown upward. It asserts that these vectors are perpendicular at the peak of the ball's trajectory and never parallel at any point. The conversation also questions the initial conditions of the throw, suggesting it may not have been directly upward, which influences the analysis. Additionally, the impact of external factors like wind or terrain is briefly mentioned but deemed irrelevant to the core question. Overall, the conclusion emphasizes the unique behavior of the vectors at the apex of the ball's path.
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Are there any points along its path at which the velocity and acceleration vectors are perpendicular? Parallel? Also, if a ball is thrown directly upward, wouldn't it fall directly back down?




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Was it thrown by a spin bowler? Are there strong winds? Could the throw have taken it to the top of a cliff several hundred feet above the thrower? Must this have occurred on any particular planet? Did the ball encounter something solid in its path, and bounce off it?
 


Nope, the question did not specify strong winds, or other planetary properties. I'm going to assume that it wasn't thrown directly upward and that it was thrown at an angle.
 


Therefore, with the assumption that I made, correct me if I am wrong, the resultant velocity only allows the vector to be perpendicular at the top of the trajectory and never parallel at any point in time and space.
 

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