Where Would a Wooden Ball Accelerate When Thrown Up and Then Let Fall Down?

[George16]

Homework Statement

If you were to throw a wooden ball up one meter and then let it fall down to a negative meter, where would it accelerate?

Homework Equations

The Attempt at a Solution

 

[CompuChip]

All the way down.
Gravity always acts on it, so as long as it is in the air it has non-zero acceleration a = F_grav/m.
Only when you hold it (straining your muscles to do so) or letting the ground exert a normal force, you can cancel it such that the net force is zero hence a = 0..