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Answer on Mechanics | Relativity Question 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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