Dropping a Black Hole from Tower of Piza

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    Black hole Hole Tower
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Discussion Overview

The discussion explores the hypothetical scenario of dropping a black hole with the radius of a softball from a tower alongside a softball. It examines the implications of gravity and acceleration in this context, questioning the validity of established principles of free fall when extreme mass is involved.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant notes that while a tennis ball and a 10 lb medicine ball fall at the same rate, the scenario changes significantly with a black hole due to its immense gravity.
  • Another participant references Newton's second law to question how the acceleration of the black hole would be affected in this scenario.
  • A third participant raises concerns about the assumptions underlying the statement that "all objects fall at the same acceleration," prompting a discussion on whether these assumptions hold in the case of a black hole.
  • One participant asserts that the softball would fall into the black hole rather than simply falling downwards, suggesting a different dynamic at play.

Areas of Agreement / Disagreement

Participants express differing views on the implications of dropping a black hole alongside a softball, with no consensus reached on the effects of the black hole's gravity or the validity of the assumptions regarding free fall.

Contextual Notes

Participants do not fully explore the mathematical implications or the specific conditions under which their statements hold true, leaving some assumptions and definitions unaddressed.

Ontophobe
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I get that if you drop a tennis ball and a 10 lb medicine ball from the top of a tower they will both reach the ground at the same time. But what if I dropped a softball and a black hole with the radius of a softball (and the mass of a small planet)? Wouldn't the tremendous gravity of the black hole pull that much harder on the Earth, thereby closing the gap between them faster than the gap between the Earth and the softball?
 
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What does Newton's second law say about the acceleration of the BH?
 
Does the answer bother you?
What are the assumptions in the statement "all objects fall at the same acceleration"?
Are the assumptions still valid here?
 
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Ontophobe said:
if I dropped a softball and a black hole with the radius of a softball

The softball would fall into the black hole, and not down.
 
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