How much work has a pitcher done on a baseball

[physicsgsu]

Homework Statement

A 0.140 kg baseball leaves a pitcher's hand at a speed of 30.0 m/s.
If air drag is negligible, how much work has the pitcher done on the ball by throwing it?



I don't even know where to start. I feel like if someone could help me find force i would be able to finish the problem

 

[physicsgsu]

nvm, figured it out