a) If you dropped an object from a height of 1.5 m above the surface of Phobos, how long would it take the object to fall to the surface? b) Phobos orbits Mars with a period of 0.319 days at a mean distance of 9400 km from the centre of Mars. Calculate the mass of Mars.
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Mars has two small satellites called Phobos and Deimos. Assume that these satellites are spherical with a mean density of 1880 kg/m3 and that the diameter of Phobos is 21 km.
a) If you dropped an object from a height of 1.5 m above the surface of Phobos, how long would it take the object to fall to the surface?
b) Phobos orbits Mars with a period of 0.319 days at a mean distance of 9400 km from the centre of Mars. Calculate the mass of Mars.
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