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Redistribute • •
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“Technical Changes Sheet” and supporting “Graph Data Sheets” CO2 cars − students will disassemble the wheels and so forth; therefore, they will need the resealable bags to hold small parts. Ask them to remove the screw eyes; these are not needed until A Day at the Races. Moreover, the screw eyes have a tendency to rip and tear the wood, particularly balsa, when handled poorly. Students will need them for weighing the car and its parts. Instruct the students to continually check the mass of their cars if they are close to the 45-gram minimum, which includes all parts except the CO2 cartridge. Paint will add minimal mass. Paint, in fact, is the only way to add mass to a car. Students should have access to the ramp and wind and smoke visualization tunnels, if available, as they continue to measure the effects of the modifications. This is a good opportunity for students to demonstrate mastery as they reuse the equipment.
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Reassembly
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At the designated time and date, instruct the students to reassemble the cars and prepare for the Race-Ready Phase.
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Extended Activities
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1. Simulation Software Car Builder software and Dragster Designer software. Students should place printed results from the software in their portfolios. 2. Mass of paint on a CO2 car Collect more data and create another table on the display board.
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Phase 12: Race-Ready Phase – Go/No Go Prepare the following materials for distribution: • “Race-Ready Phase Data Sheet”
View With the class, view The Science of Speed video, Phases 12 and 13, RaceReady Phase – Go/No Go and Design and Aesthetic Judging.
Distribute •
“Race-Ready Phase Data Sheet”