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A 160 kg rocket is moving radially outward from the earth at an altitude of 230...

A 160 kg rocket is moving radially outward from the earth at an altitude of 230 km above the surface with a velocity of 3.9 km/sec. At this point, its final stage engine shuts off. 1)Ignoring any minor air resistance, what is the rocket's velocity 1050 km above the surface of the earth?"; m/sec

2)Again ignoring any minor air resistance, what is the rocket's velocity 1050 km above the surface of the earth if its mass were 320 kg? m/sec

3)What is the maximum height of the rocket above the earth's surface (using the initial rocket mass of $ m

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