The accompanying double-exposure photograph illustrates a method for determining the speed...

The accompanying double-exposure photograph illustrates a method for determining the speed of a BB. The circular disk in the upper part of the photo rotates with a constant angular speed of 50.4 revolutions per second. A single white radial line drawn on the disk is seen in two locations in the double exposure. Below the disk are two bright images of a BB taken during thetwo exposures. Use the information given here and in the photo to estimate the speed of the BB.

Speeding BB and spinning wheel. (Problem)