Zip-A-Dee-Do-Dah

Q:  For Zip-A-Dee-Do-Dah, the event description says SI units will be used. Can you clarify what this is? Will the students need to know how to do any unit conversion (inch to feet or centimeters to meters)?

A: By SI units, we mean that distance will be expressed in meters, time in seconds, and speed in meters/second. The students will not need to do any unit conversions on the test.

Zip-A-Dee-Do-Dah

Q: In regards to Zip event, when kids are in the competition room, do they have the opportunity to modify the cable car in between each of the runs (i.e. after the 1st and 2nd one) or just after the first two? The event description states they will have 2 minutes to modify after the first two runs, but is that the only opportunity for modification?

A: The students will only have 2 chances to modify the cable car (after the 1st run and the 2nd run). Since there are only 3 runs in total, there is no need for modifications after the 3rd run. 

Zip A Dee Doo Dah

Q:   For Zip a dee doo dah, does the ping pong ball need to stay in the carrier just between the photogates? (ie, if the ball falls out after hitting the end of the zip line, is that ok?)

A:  Yes, the ping pong ball needs to stay in the carrier just between the photogates. If the ball falls out after hitting the end of the zip line, that is ok.

Zip-Ah-Dee-Doo-Dah

Q1: Will there be constraints on the amount of tape provided to students to create their biplane (i.e. a certain amount of tape) ?
A1: The students will have as much tape as they need to create their cable car.
 
Q2: The description of the event reads, “The sample data will be in SI units, and the final answer should be provided in SI units as well.” Is this anything more technical than meters per sec?
A2: Distance should be expressed in meters, time in seconds, and speed in meters per second.
 
Q3: Our team has a question. Are there rules for how the zip-line harness is attached to the cable car?  Can they use any of their materials including the tape?
A3: There are no rules for how the zip-line harness is attached to the cable car. However, the students may need to attach and reattach the harness to the cable car quickly. The students can use any of their materials to attach the harness, including the tape.
 
Q4: Do they attach the harness right when they get ready for their run or in the build time? The description says they need to attach it in 30 seconds  – it also says they have 30 seconds to place their ping pong ball in the cable car.  Is this the same 30 seconds? Or is there 1 minute total to prepare?
Q4: The students will need to prepare their cable car for launch in approximately 30 seconds. This time includes attaching the cable car to the harness, placing the ping pong ball in the cable car, and attaching the harness to the zip-line.

Zip-Ah- Dee-Doo- Dah

Q: In the Zip event, do the kids put the ping pong ball in before they enter the competition room or does an official put it in for them?
 
A: The students put the ping pong ball in their cable car in the competition room to demonstrate that the ping pong ball is not taped in.