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Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?