Clarification of the laws applied

[ngbhong]

I am a first year student and i am required to build one thing based on one physics law . if i build a rubber band powered airplane , what laws should i say it applies? and what about rubber band powered car??

 

[Mech_Engineer]

You're going to need to clarify what "laws of physics" you're meant to pick from. It seems to me "rubber band powered" anything will have stored energy; what laws will apply to transfer of stored energy?

 

[David Lewis]

With the rubber band powered airplane, you could demonstrate Newton's Laws of Motion, construct a free-body diagram, analyze the flight path and calculate lift coefficient, thrust, or find the rubber band, propeller or wing design that maximizes endurance.