Fly to the sky

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Ski jumping is a sport in which skiers go down a take-off ramp, jump and attempt to land as far as possible down the hill below. If the length and height of the ramp are \(90\) m and \(50\) m, respectively, and the weight of skier is \(100\) kg, then how much potential energy can the skier use? (The magnitude of the gravitational acceleration is 9.8 m/\(s^2\).)

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