It's normal and ok.
If the 9 year old was very good or if Messi slipped or if he deliberately let him, then the 9 year old could take the ball off him. Realistically, a 9 year old would not get the ball from Messi.
130-160
When the boy catches the ball while standing on roller skates, the boy's velocity decreases to zero as he comes to a stop. The ball's velocity also decreases to zero as it is caught by the boy.
they can throw one maybe 3 times a game but not for every batter
A soccer ball if they like soccer or something that they like that is not to expensive.
the ball was square
yes very much so My 10 year old can. It just takes good will and a lot of practice
Pitching a fast ball at 69 mph will not harm a 13 year old. A 13 year old should not be allowed to pitch a curve ball or any other pitch that may hurt his pitching arm. Curve balls should never be pitched by any boy under the age of 16.
To become a ball boy you usually need to have an in with the team you want to ball boy for or know the owner.
the ball was easily caught by the captain OR (not passive but sounds better) the ball was an easy c atch for the captain
the boy has a ball sack