Quick Question about throwing a ball vertically

[iBill]

If I were to throw a ball vertically upward, would the initial velocity of the ball be the same as the final velocity of my arm?

 

[Trevormbarker]

if by final you mean the second the ball leaves your hand, yes

 

[iBill]

if by final you mean the second the ball leaves your hand, yes

Yes that is what I meant, thx.

 

[braindead99]

Maybe not so simple - a ball is compressible - so as you accelerate the ball you will compress the ball's side nearest your hand. As the ball leaves your hand your arm must have been decelerating - or presumably the ball wouldn't have left your hand. The question is what happened to the energy you used to compress the ball on acceleration - did it give a kick to the ball which was decompressing on launch or was it already recovered somewhere in your arm motion before the ball left your hand? I don't know :( Try with a softly inflated balloon to see if you can see or feel what happens on release.

 

[PJC01]

No, the initial velocity of the ball would not be the same as the final velocity of your arm. This is because when you throw a ball, the initial velocity of the ball is determined by the force and angle of your throw, while the final velocity of your arm is determined by the force and angle of your arm's movement. Additionally, the ball will experience air resistance and gravity, causing its velocity to change as it travels upward. The final velocity of the ball will also be affected by these forces as it falls back down. Therefore, the initial and final velocities of the ball and your arm will be different.