A450 x 102 kg hot-air balloon takes off from rest at the

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A 4.50 x 10² kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 x 10⁴J of work on the balloon in the process. At what height above the surface of the earth does the balloon have a speed of 7.90 m/s?

Reference no: EM13645008

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