Question
15. At lift-off, a rocket weighs 32.5 tons, including fuel. It is
fired vertically, and, during the first stage of ascent, the fuel
is consumed at 1.25 tons per 1000 ft of ascent. How much
work is done in lifting the rocket to an altitude of 12,000 ft?

Image Transcription

15. At lift-off, a rocket weighs 32.5 tons, including fuel. It is fired vertically, and, during the first stage of ascent, the fuel is consumed at 1.25 tons per 1000 ft of ascent. How much work is done in lifting the rocket to an altitude of 12,000 ft?

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