I have a simple question: Does gravity slow down a horizontally thrown baseball?
Assuming when a baseball is thrown it has a vertical velocity as well, does it slow does the ball?
Any help is much appreciated.
(I can't quite comment on the previous post, so I'll have to write a new answer).
If we set the curvature of the Earth to be non-negligible in our problem, yes, gravity would slow the baseball down by an extremely tiny amount, but, if we exclude this case (which, again, I stress to be many orders of magnitude below anything considerable), then no, gravity itself does not slow the ball down since the force of attraction (the direction of the vector of acceleration) points exactly downwards and contributes nothing to the horizontal component.
No, gravitational acceleration is vertically downwards. It does not affect the horizontal velocity of any projectile.