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How can an object moving through air be considered "trapped" according to the principle of kluta kemishun chadamia? The shiur develops a chiddush based on gravitational forces: when thrown between domains, an object becomes trapped by the gravitational pull of the domain below, creating a connection without requiring physical placement. This resolves the machlokes between Rashi (רש"י) and Rabbeinu Chananel and explains why objects in hand aren't subject to this principle.
This shiur presents a comprehensive analysis of the Talmudic principle of 'kluta kemishun chadamia' (being trapped as if placed down), found on daf 4a of Masechta Shabbos (שבת). Rabbi Zweig begins by questioning the very foundation of this concept - what does it mean for something to be 'trapped' when it's simply moving through the air? The Gemara (גמרא) discusses a dispute between Rabbi Akiva, who holds kluta kemishun chadamia (objects passing through airspace are considered as if placed there), and the Chachamim who disagree. A fundamental question emerges: how can the Gemara create such a principle without clear precedent, and if an object is considered 'placed' in a domain, shouldn't it be subject to the requirement of 'dalet al dalet' (four by four handbreadths)? Rabbi Zweig proposes a revolutionary understanding based on gravitational pull. When an object is thrown from one domain to another, it becomes subject to gravitational force pulling it downward. This gravitational pull creates a connection (kesher) between the object and the ground of the domain it passes through. The object is thus 'nikla' (trapped) in that domain's gravitational field, even while moving through the air. This explains Rashi (רש"י)'s language of 'hoyov v'nikla' - the object is moving but simultaneously trapped by gravitational forces.
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Shabbos 4a
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