Linear motion

Monday began in the classroom with the question of what would happen on a time versus distance graph for an object moving at a constant rate. One student suggested that there would be a slope and another suggested that the slope would be negative.


The class then went out to the sidewalk where I measured off 30 meters and then did a cold open on the RipStik. 


At this point I asked if the predicted model was possible. The student who had suggested the negative slope said it was not possible. I then took the RipStick to the east end of the run out near 33 meters and rode back to zero while timing.


Possible.


The velocity for the second run is a negative velocity. Negative slope, negative velocity. This was the first term for a negative velocity, but this would prove useful throughout the week.



Wednesday I would start with the two velocities determined on Monday as seen above. Coverage of the operation of the stopwatch followed this review.

Then I laid out the activity for Wednesday: determining how fast a student walks using the chronographs and a 30 meter stretch of sidewalk.


Thursday opened with a rainbow. How many colors are there in the rainbow? The morning class saw only two in attendance, no photos of the layout were taken. The small class size led naturally to changes in the layout of the ball speed runs on the sidewalk. These changes were retained at 11:00. 


Board work on Thursday. The class started in A101 but finished on the sidewalk. I used the Tripltek tablet to good advantage to demonstrate Desmos use for this laboratory in the field, so the class did not need to return to the classroom to use the Sansui.

Annilihna records data in Desmos while Rosie-Rita reports split times

Fredson, Reagan, and Jocela working with the stopwatches

Ann Loverina reports times while Joe Scott Smith records data into Desmos

Tommy timed while Alexander entered results into Desmos

The set up this term had zero for the slow and medium speed ball runs beginning in front of the faculty office building. This was in large part because the zero used in the past towards the west was both sunny and wet this morning. 

Malisa, Kiora, and Reagan

Ann Loverina and Joe Scott Smith

Fredson stepped in to bowl for Malisa

Kiora worked as catcher for the runs

Kiora

Fredson is at the zero line for slow and medium speed ball runs

The slow speed ball runs were timed from 0 meters with laps at 2, 3, 4, and 5 meters. The medium speed ball runs were lap timed at 2, 4, 6, 8, and 10 meters. 

Fauna records data into Desmos in the field


Fredson bowls a fast ball across a second set of marks starting as western zero and lap times at 3, 6, 9, 12, and 15 meters.

8:00


11:00


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