The principle ofa roller coaster : lifting the train to a very high place . Letting the train fall due to gravity . The geometry of the track is designed to meet desired acceleration ( fear factor ).
7.
The minimum height h ? H = 2R cannot make a circle run. In short, 凌霄飛車利用 動能 與 位能 之間的轉換運作。
8.
Energy Conversion (between U & K ) Are they other forms of energies? Directly implies: This we call the conservation of total energy.