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A starship lands on a planet of mass 6*10^23 kg. An astronaut throws a rock of mass 9.5 kg up from the ground at 17 m/s. The maximum height reached by the rock is 100 m.
a) what is the gravitational acceleration on the rock?
b) what is the radius of the planet?
c) what is the escape velocity of the planet?
An ocean liner leaves New York City and travels 21° north of east for 134km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
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