When you are out fishing on a lake one day, you get your line snagged on a floating tree branch. Luckily the branch is not attached to anything, so you can reel it in to unhook your line. As you reel in the branch, it moves toward you at a constant speed. The amount of work you are doing on the branch is
A. exactly zero.
B. constant, but negative—the branch does work on you.
C. constant and positive—you do work on the branch.
D. exactly equal to the kinetic energy of the branch.
Answer:C
When you are out fishing on a lake one day, you get your line snagged on a floating tree branch. Luckily the branch is not attached to anything, so you can reel it in to unhook your line. As you reel in the branch, it moves toward you at a constant speed. The amount of work you are doing on the branch is
A. exactly zero. B. constant, but negative—the branch does work on you. C. constant and positive—you do work on the branch. D. exactly equal to the kinetic energy of the branch.