Bungee Bear Lab Lucie Coleman, Molly Bright, Yvane Ngassa

Cuter than our Bear, but that's okay!

To what does your group contribute the success of the group?

Our group was successful because we worked together well as a team. As a team, we were able to trust each other to finish our classwork at home allowing us to stay up to date with current work and use our class time most efficiently. Because we were able to stay on schedule, the project was manageable and not overwhelming.

A video including all 3 of our trials below:

To what does your group contribute the failures of the group?

Although we met all of our success criteria, our bear could have come closer to the ground. If our bear had been within 0.25 meters, we would have scored more points. We believe our bear didn't come within this 0.25 meters because of sources of error resulting in the differences between our simulation results and our actual results. Our simulation predicted that our bear would fall within 0.25 meters. However, our actual elastics may have had a different spring constant than our simulation had calculated, resulting in the difference between where our bear actually fell and where we expected it to fall.

What did your group learn by doing this engineering design challenge?

During this engineering design challenge, our group learned a lot. We learned that it takes lots of preparation and design to create a functional prototype of a product. We also learned the relationship between elastics and springs. You can use the same methods to find the spring constant of the elastics. For instance, in parallel elastics and springs, K1+K2 can be used to find K parallel. As well as for series, the sum of the reciprocals of K can be used to find the reciprocal of the spring constant of the series. It was also interesting to see the real life application of the springs in action.

Our bear at its lowest point!

What could have your group done differently to make your project more successful?

Our group could have spent more time measuring and checking our actual bungee cord before we put it to the test. If we had double checked more of our measurements, we could have calculated our actual bungee cords spring constant, stretch, etc. If we had calculated these variables, we would have known where our bear would have fallen. If our calculated numbers came out to be different from our simulation numbers, we could have made the adjustments we needed to ensure that our bear would fall within 0.25 meters to score us full credit.

What would your group recommend to students doing this challenge in the future?

We would recommend that groups try their best to stay with the class schedule. To help stay on schedule, we recommend finishing class work at home. Because we stayed on schedule, the project was less overwhelming and more manageable. We would also recommend that you ask clarifying questions because some of the directions and criteria are open to multiple interpretations and can be difficult to decipher.

What about your block’s successful criteria would your group change and why?

Although we thought that our groups success criteria was attainable, we would recommend a few changes. First, we would recommend that instead of having intervals of 0.25 meters when measuring for success, we think that having intervals of 0.5 meters would have been more attainable for more groups.

Credits:

Created with images by Alexas_Fotos - "bears art stone cute" • lpiepiora - "fearless bungee jump" • ummzakariyya - "success sand sea"

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