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A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. (The radius of the Earth is 6.38 multiply.gif 106 m.)
(a) Ignoring air resistance, determine how far from the center of the Earth the projectile travels before stopping momentarily.
m
(b) What is the altitude of the projectile at this instant?
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Two metal spheres, each of mass 14 g and initially at rest, are dropped from a height of 6 m in an evacuated chamber. Find the difference in final speeds of the two spheres
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