**Sample Problem 7-10a**
The power transferred by F1 is -6W
The power transferred by F2 is 6W
The net power transferred is 0W
The Kinetic energy is not changing

**Sample Problem 7-10b**
The power transferred by F1 is -6W
The power transferred by F2 is 9W
The net power transferred is 3W
The Kinetic Energy is changing