6.) A new Earth size planet has been discovered in a distant star system. The planet has six times the mass of Earth and has a radius of twice the radius of the Earth. Do NOT mix system of units.  What is the acceleration due to gravity on the newly discovered planet? (in units of ft/s2)  ap = Nm/Nr2 (32.2 ft/s2) Nm = mass of planet Nr = radius of the planet  to determine acceleration due to gravity use : ap = Gm / r2

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