# Answer to Question #19088 in Mechanics | Relativity for Joshua

Question #19088

A roller coaster is traveling at 5 m/s at the top of a hill 40 m above the ground. What is the speed of the roller coaster when it is 15 m above the ground?

Expert's answer

Required speed = sqrt[5^2 + 2*9.8*(40-15)] = 22.7 m/s

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