Answer:
A roller coaster would definitely not depend gravity to be fast. Roller coasters are usually designed to use gravitational energy in the first peak to generate enough inertia to have the speed to go really fast throughout the rest of the ride without much more propellant power from the actual engineering of the track. So a roller coaster would probably have to continuously pull the cars in order to fight the weak gravitation field that would prevent the cars from accelerating when falling.
it would accelerate more slowly so you'd have to wait a while for it to go to full speed
Step-by-step explanation:
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