Question: (a) Assume the Earth is a uniform solid sphere. Find the kinetic energy of the Earth due to its rotation about its axis? (b) Suppose

(a) Assume the Earth is a uniform solid sphere. Find the kinetic energy of the Earth due to its rotation about its axis?
(b) Suppose we could somehow extract 1.0% of the Earth's rotational kinetic energy to use for other purposes. By how much would that change the length of the day?
(c) For how many years would 1.0% of the Earth's rotational kinetic energy supply the world's energy usage (assume a constant 1.0 × 1021 J per year)?

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a The rotational inertia of a uniform solid sphere is I 25 MR 2 Use Eq 81 Find the kinetic energy ... View full answer

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