A hole is drilled from the surface of Earth to its center,
Chapter , Problem 98(choose chapter or problem)
A hole is drilled from the surface of Earth to its center, as in Figure 11-30. Ignore Earths rotation and any effects due to air resistance, and model Earth as a uniform sphere. (a) How much work is required to lift a particle of mass m from the center of Earth to Earths surface? (b) If the particle is dropped from rest at the surface of Earth, what is its speed when it reaches the center of Earth? (c) What is the escape speed for a particle projected from the center of Earth? Express your answers in terms of
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