If you roll a 5.0 kg bowling ball down the alley at 10 ms how much work did you do on the ball?

None (approximately). Here's why: "Work" in physics has a slightly different meaning from the usual way we speak of work. In ordinary life we consider work as exerting force for a period of time. In physics we have to overcome forces that result in a change of position. Work=Force X Distance. If a Bowling ball rolls down the lane but on the other end shoot up a small ramp and winds up at the same elevation maybe where you are standing, no work has been done. (We'll ignore making a strike on the pins, which requires work to return the ball....). This "work" idea usually adds to the confusion students experience. They didn't have to use THE SAME Word and then explain the difference. This drives people crazy. http://galileoandeinstein.physics.Virginia.edu/lectures/momentum.html