A rotating cylinder is mounted on a cart that can roll to the left or the right along a track as seen in the photograph below.
Initially the cylinder is set into motion counterclockwise as seen from above, as can be viewed in a short video by clicking here in mpeg or movie format. After the rotor is spinning at full rotational speed, the fan is turned on, blowing air out past the rotor toward the viewer.
The question this week involves what will happen to the rotor cart after the fan commences blowing air. four possibilities are listed below.
When the fan blows air past the rapidly rotating rotator:
Click here for Answer #220 after May 9, 2005.
