PBS Space Time PBS Space Time

Perpetual Motion From Negative Mass?

Oct 30, 2026 · 19m

Summary

This episode explores the theoretical implications of negative mass, examining how it behaves under Newtonian mechanics and Einstein’s general relativity. The host discusses the paradoxes arising from negative inertial mass, such as objects accelerating away from applied forces and the potential for infinite energy violations. By analyzing the equivalence principle and geodesic paths, the discussion questions whether negative mass can physically exist or if it leads to incoherent predictions.

Topics discussed

Sponsor: SAP Concur Sponsor: Sephora Holiday Gifting Challenge Question: Negative Mass Apples Introduction to Negative Mass and Dark Fluid Newtonian Physics: Inertial vs Gravitational Mass Gravitational Forces Between Like and Opposite Masses Sponsors: SAP Concur and Sephora Sponsor: LinkedIn Hiring Pro The Runaway Motion Paradox and Crackpot Conjecture General Relativity and the Equivalence Principle Energy Conditions and Infinite Energy Wells Sponsors: SAP Concur, Sephora, LinkedIn Analyzing Assumptions in Geodesic Equations The Incoherence of Negative Inertial Mass Unresolved Physics and Community Debate Challenge: Building a Perpetual Motion Machine Sponsors: SAP, Sephora, LinkedIn, McDonald's, Cuvasier
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