Linear velocity with a four square ball

In a return to an earlier version of the laboratory, a four square ball was rolled slow, medium, and fast across markings at one meter, two meters, and three meters for each speed respectively.

The morning set up, tape measure on the right.

Four square ball coming back in from a run

Four square ball inbound to distance equals zero marker ahead at the next post, timing started there. 

Some students working in the field entered data into Desmos from chronographs as the data came in.

Mercedes enters data, Derisalynn on timing

In the morning the fast ball was timed at four meter intervals

Johannes reads values on the chronograph

Destiny Grace records data while Herna reads times. Destiny is a second gen student for me.

Melrose records data while Mikie reads times

This laboratory actually went better than I had recalled. I bowled for both sections. A two handed push produced reasonably slow speeds that were perhaps a tad higher than historical values, but the extra oomph also saw the ball make the six meter mark fairly easily at 1.5 to 2 m/s. Meter on meter lap times were tight at 0.5 seconds but doable. I used a two hand pitch at medium speeds, and a two meter lap distance was workable. In the morning the fast ball was timed on four meter intervals, in the afternoon I added marks to the north side of the sidewalk at three meter intervals and kept the fast ball up around 6.5 to 7.5 m/s.