OSCILLATORY MOTION9. In Example 2 of Chapter 7 we found that the gravitational force on a mass minside a spherical earth of uniform density p is F = kr, directed toward the cen-ter, with k = TGpm.(a) For a mass dropped from the surface of the earth down a tunnel straight throughthe center of the earth, find the time T, to pass entirely through the earth andback again.(b) Compute the speed of the mass m as it passes through the center of the earth.(c) Compare your result for T, with the time 72 required to complete a circular orbitaround the globe just above the earth's surface.

Subpart (a): The formula to calculate the acceleration due to gravity on the surface of the Earth is…

Answered: 9. In Example 2 of Chapter 7 we found…

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