How structurally strong would an object need to be to survive a trip through an ergosphere?

Let us assume we have a Kerr metric (rotating) black hole of 10 Sol-masses, spinning at 300 revs/s (as measured by a rest frame observer). What yield strength (assume that yield strength is limiting here in order to prevent failures in compression) would be required for the structural members of:

1. a 1km radius sphere, or
2. a 1km/side cube

in order for it to survive the gravitational forces of a prograde passage through the ergosphere, along a course in plane with and secant to the equator that passes through a point halfway between the ergosphere's equatorial radius and the event horizon's equatorial radius?

Assume the object is traveling at a constant 1km/s before entering the significant influence of the black hole, if that matters whatsoever.

(If the 1km object is too large to fit into the ergosphere of the given black hole, please let me know.)

posted over 7 years ago

Shalvenay‭

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