Why does a ball move in your hand when net forces are 0?

[Matt Poirier]

This is a more general and probably silly question, but if you have a ball in your hand and you move it upwards, the acceleration will be positive then after you move it at constant velocity, acceleration will be 0. However, how is net force is 0 when the ball is still moving? You are clearly still pushing on the ball, so does your hand's push and air friction cancel so net force is 0?

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[Orodruin]

You are clearly still pushing on the ball, so does your hand's push and air friction cancel so net force is 0?

You forgot gravity, but yes, the net force being zero is not the same as all individual forces being zero, just the sum of them.