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Questions
-
What is the stored source of power for your model car?
(The stretched rubber skin of the balloon.)
- What
are the three most important factors that affect the performance
of your vehicle?
(Accept all reasonable answers such as larger balloon, bigger
wheels, etc.)
- What
design factors are least applicable for transfer between your
scale model and a full-sized vehicle? Explain.
(Accept all reasonable answers such as balloon engine, no passenger
load, etc.)
Critical
Stretch
Does a reused balloon have the same energy storage
potential as a new balloon? Considering the challenges of balloon
reuse, how can you best insure that your testing is not affected
by changes in the balloon's stored energy?
(Run trials with balloons of equal usage history.)
Transfer
of Energy
Although the model car got its immediate thrust from the rush of
air that raced out of the balloon nozzle, where did this energy
first originate? (The sun.) Trace back the steps of energy
conversion. Identify each step of the transfer and identify any
energy losses associated with that change.
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