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A roller coaster has a mass of 275 kg. It sits at the top of a hill with height 85 m. If it drops from this hill, how fast is it going when it reaches the bottom?

1 Answer
Nov 9, 2016




The potential energy of the roller coaster is converted into kinetic energy when it reaches the bottom.

So we can write:




As you can see, the mass given is irrelevant to the question.