Question

What effect does mass have on a rollercoaster ride?
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Answer 1

the weight and force of the roller coast and the speed of when it goes up and down

Answer 2

The more mass a body has the more inertia it has. If the roller coaster is moving, it will want to keep moving, along the direction of motion, unless something causes it to speed up or slow down. This resistance of the moving roller coaster to changing its velocity is another example of its inertia.