Linear velocity

The Wednesday diagram on chronograph use was still on the board.


This introduction including the equation works well to prepare the students for the lab on Thursday.


Walking speed and chronograph use was on Wednesday, on the right is the Thursday laboratory.

An El Niño southwest wind generated a south wind between the buildings. The venturi effect increased the crosswind speed. Despite this, the ball generally rolled straight. The slight slope offsets friction quite nicely.

Marks every 1.5 meters for the slow ball roll.

Practice roll
The moderate speed ball was timed on three meter intervals. The fast ball on six meter intervals. 

Recording data directly into Desmos. 

Back in the classroom by 09:46. Demonstrating 0 m/s and the impossibility of a vertical line. Played Billy Preston's nothing from nothing.

Right board.


Left board including coverage of the zero in the denominator problem. Center panel is the lab report layout.



The 11:00 lab was back in the classroom by 12:15, 36 minutes earlier than the 8:00 section. This was both a reflection of a slower start at 8:00, the need to write directions on the board at 8:00, and that the 11:00 class was more adept at using the chronographs. They needed far fewer runs to get good data.

11:00 coverage of the zero problem. More Billy Preston.

End of lab right board.

Data from students was used both at 8:00 and 11:00. 

These were done on the smartboard to show how to match colors. 


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