A small body is dropped into a narrow channel drilled along the Earth axis. Considering the Earth to be a homogeneous sphere and disregarding air resistance answer the following questions. (Acceleration due gravity on the surface of the Earth is g, Radius of Earth is R) The magnitude of body's speed as a function of r is

A small body is dropped into a narrow channel drilled along the Earth

1.	A small body is dropped into a narrow channel drilled along the Earth axis. Considering the Earth to be a homogeneous sphere and disregarding air resistance answer the following questions. (Acceleration due gravity on the surface of the Earth is g, Radius of Earth is R) The magnitude of body's speed as a function of r is
Answer» `sqrt((2G(R^2-r^2))/R)` `sqrt((g(R^2-r^2))/R)` `sqrt(g(R^2-r^2)/(2R))` NONE of these Answer :B

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