Acceleration of gravity and the new health center building


The 11:00 session would explore use of the new health center for drop heights from to three to five meters.

Just-Wesley, Lousaintra, and Finolla working at one meter

Tommy Lee, LizzyAnn, and Bennie

Austin and Leann

Lousaintra drops from two meters while Finolla steadies the meter sticks. Just-Wesley records data.

Tayshaun on the meter sticks.

Austin times and drops while Leann records data. Four and five meters is done from the balcony.

The (0, 0) data point is not a measurement. That point must be in the data set. This a linear model is ruled out. That is the important of the (0,0) data value.

Leann created an unstable equilibrium balance sculpture.

The ball is balanced on the curved face of the stopwatch, which in turn is balanced on the edge of the meter stick which is edgewise on top of a second meter stick also on edge. Impressive.

 
In the 11:00 section, Brithney making drops from two meters.

Three meters would be up at the ceiling. Out of reach for the students.

Two meters along the windows

Ariana and Meramy making measurements at one meter.

Kayla working at two meters.

Measurements done intently with focus by Ariana and Meramy.

Looking over at the new health center there were clearly possibilities. 

And three meters was suddenly within the realm of possible.

The three meter post is on the first flight of stairs.

Four meters is available from this balcony down to the stair tread directly below.

Five meters is available from the skywalk to the ground. Balls tend to bounce out into the lawn.

Brithney dropping an orange ball from three meters.

The five meter drop location. There is more of a ledge beyond the railing which obscures the view down for some students.

Another view of the five meter drop point.

The students found a second more reliable four meter drop location up on the second flight of stairs opposite the three meter drop location. This dropped the ball into an under stair area used to store chairs and tables.


KC prepares to drop from the new four meter location.


Kayla dropping and timing from the three meter mark.


A view towards the storage area into which the four meter ball drops were falling.


A view of the three and for meter drop points.


While the 8:00 class all produced values clustered around 9.8 m/s², the 11:00 data was widely spread out. The additional data point at three meters didn't benefit the results. This suggests that the sight lines are more obscured - many sites require a further lean out. This may negatively impact timings. Perhaps the A building remains the better option.

Left board 

Right board

Comments

Post a Comment

Popular posts from this blog

Plotting polar coordinates in Desmos and a vector addition demonstrator

Image
In an earlier post I noted that Desmos did not directly plot polar coordinates. Not only was I incorrect, but Desmos responded to my blog to correct me! Although I had at some point seen that one could define a function f(x)=3x+5 and then have Desmos calculate f(6), I had not absorbed how this might be used to plot polar coordinates. The above works beautifully . Realizing that I could effectively program Desmos, I applied this thinking to demonstrating how to add two vectors when given the magnitudes m and the direction angles theta. The graph calculates the i and j components for the two vectors and then adds the vectors, graphically displaying the result while also providing information on the magnitude and direction of the vector sum. m1 and theta1 are the magnitude and direction angle for one of the two vectors, m2 and theta2 are the magnitude and direction for the other vector. All four are dynamically interactive and can be changed. The diagram purports to illustra...
Read more

Traditional food dishes of Micronesia

Image
Clara, Jennette, and Joanie presented ground hard taro cooked in an umw, effectively a hot rock oven. Pohnpeian: rotama. Pingelapese: sero. Mwoakillese: rodma. Mortlockese: Amahd. Kosrae: rodoma. After cooking in an umw the rotama is pounded with the petiole of a palm frond. Rotama is made from hard or swamp taro, known as mwahng on Pohnpei, mweian on Pingalap, pula in Mortlockese, and pahsruhk on Kosrae. In traditional times on the outer islands the women had primary responsibility for tending the taro while the men handled fishing and climbing tasks. Joesen and Noeleen presented fermented breadfruit from the outer islands of Yap such as Woleai and Eauripik. The raw ingredients were actually brought in from Yap, Noeleen prepared the maare.  The leaf wrap is ti leaf - Cordyline fruticosa. Pauleen, Barnson, Trisha, Verginia, Con-ray, and Maylanda from Kitti, Pohnpei brought in mahi umw, koahpnoair koakihr, and uht sukusuk. Above is breadfruit umw, mahi umw, o...
Read more

Setting up a boxplot chart in Google Sheets with multiple boxplots on a single chart

Image
The  Google Statistics  add-on for Google Sheets can display multiple boxplots in a single chart. The key is the layout of the data. One column should be the variable by which the data is to be grouped, the other column should be the data to be box plotted. Set up the Statistics add-on with the data to be plotted as the variable, and the grouping column as the "by" variable. In this image I had deselected all but the boxplot option, the result was the appearance of the Moment, Standard errors, and Confidence intervals options. The default is apparently a 95% confidence interval for the mean. The result is multiple boxplots on a single chart with a common scale. The new tab that is created also quotes 95% confidence intervals for the mean. Note that as of 2018 the Google Statistics add-on cannot be found by search in the add-ons. In addition, as of May 2018 the add-on no longer verifies, possibly due to the add-on not having been updated since August 2017. One may ha...
Read more