Acceleration after applying a force

[archaic]

Hello,
1) Suppose I throw a ball with a force $F=ma$, the instant it leaves my hand, does it have the same acceleration $a$ added to it accelerations due to "ambient" forces (air resistance, gravity..)?
2) If I am right about 1), doesn't my hand already carry the acceleration/deceleration due to those forces? So why isn't it only $a$?
3) Generally, when I make something move, do I give it acceleration or velocity? I think velocity since I cause a displacement.

 

[Doc Al]

Hello,
1) Suppose I throw a ball with a force $F=ma$, the instant it leaves my hand, does it have the same acceleration $a$ added to it accelerations due to "ambient" forces (air resistance, gravity..)?

While your hand is in contact with the ball you exert some force on it, adding to the net force on the ball, which determines its acceleration. As soon as the ball leaves your hand, your hand no longer exerts a force on it.

 

[archaic]

While your hand is in contact with the ball you exert some force on it, adding to the net force on the ball, which determines its acceleration. As soon as the ball leaves your hand, your hand no longer exerts a force on it.

Yes, but the moment it leaves my hand does it conserve that $a$?

 

[Doc Al]

Yes, but the moment it leaves my hand does it conserve that $a$?

No. Something accelerates only when there's a net force on it. Remove the force and there's no longer an acceleration.

 

[anorlunda]

Here is a recent thread with almost exactly the same question.
https://www.physicsforums.com/threads/muzzle-velocity-question.968930/#post-6154034