I never said that, did I? and that's why I said I am wearing a baseball catcher's glove. The energy goes 99% to my poor hand. Sure
In this case the ball is douing no work on the ball. And I am doing negative work on the ball.
3) has no answer yet, can you tell me a case when I stop the ball with my hand doing no (or less) work?
Thanks a lot
In the first case, that of the glove, lets suppose that your hand doesn't move at all. Well, the KE of the ball will transform in work done by the glove and your hand tissues, resisting the braking ball and deforming elastically. The ball will also deform elastically, and if it does not rebound, when the deformations disappear and everything regains its former shape, all the KE the ball had will have turned into heat, rising the temperature of the glove, the hand, the ball, and the surrounding air...
If your hand were indeformable, and didn't move at all when struck by the ball, all the elastic deformations mentioned above will take place in the ball only...