Question 1:
Most of the device was pretty even in turns of energy usage but if there was one part that was exceptionally wasteful, it would have to be the gun shooting the tennis ball. Because the gun has a vast amount of energy and power but all it does is push a tennis ball ever so slightly to right.
Question 2:
The transfer that was most efficient was when the tennis ball crashed into the wood blocks and made domino-like effects. The reason I think it was the most efficient is because the tennis ball was relatively slow moving. Yet, it was still able to knock down many big and heavy wood blocks by making a domino effect
Question 3:
I've learned many things about this device, especially how difficult it must have been for the TED talk people to construct something of such magnitude. Every little step has to be perfect and tested many times. Every time you test it you must set it back to it's original state. It's a very tedious and time consuming process, but rewarding when everything works out.
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