Question

A thin spherical shell has a radius of 2.4 m and a mass of 410 kg, and its center is located at the origin of a coordinate system. Another spherical shell with a radius of 1 m and mass 135 kg is inside the larger shell with its center at 0.6 m on the x axis. What is the gravitational force of attraction between the two shells?

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Answer 1

Each shell can be treated as a point-source mass with all of its mass at the center of the spherical shell.

The two centers are 0.6 m apart.

F = G*410*135/(0.6)^2

You don't need to use the radii of the shells. Look up the universal gravity constant G and do the numbers.