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A spherically symmetric gravitational sy...

A spherically symmetric gravitational system of particles has a mass density
`overset(rho" for "rleR) underset(0" for "rgtR)`
Where `rho_0` is a constant. A test mass can undergo circular motion under the influence of the gravitational field or particles. Its speed v as a functional of distance r (0ltrlt`oo`) from the centre of the system is represented by

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