a space station is composed of 2 concentric circles. the inner circe has diameter 5km(r=2.5 km) and the outer has a diameter 10 km (r=5km). g= 1.64 m/s^2 for the outer circle and i need g for the inner circle(adsbygoogle = window.adsbygoogle || []).push({});

i know g = G *M/r^2

so perhaps i can calculate M?

1.64 = 6.67E-11 * M/5000^2

so M= 6.1E17 kg for the whole planet.

but how do i calcaulte g only for the inner radius since the mass contained in the inner radius is unknown.

thanks

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# Artificial gravity problem

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