Claim Verification: "Heavier objects fall faster than lighter objects even in a perfect vacuum." — Disproved

Automated fact-verification of the claim: "Heavier objects fall faster than lighter objects even in a perfect vacuum." Verdict: DISPROVED Key Findings Newton's Second Law proves acceleration is mass-independent: For any object, F = mg and a = F/m = g. The mass cancels algebraically, so all objects experience the same gravitational acceleration regardless of mass (A1). NASA confirms all objects free fall with the same acceleration in a vacuum, regardless of size, shape, or weight (B1). The Apollo 15 hammer-feather experiment demonstrated on the Moon that a 1.32 kg hammer and a 0.03 kg feather fell at the same rate when dropped simultaneously in the lunar vacuum (B2). The Weak Equivalence Principle — a cornerstone of general relativity — states that the acceleration of a test particle in a gravitational field is independent of its properties, including its rest mass (B3). No credible scientific source supports the claim. Aristotle's intuition that heavier objects fall faster was based on observations in air and has been thoroughly disproved. Files proof.py — Re-runnable Python verification script proof.md — Structured proof report proof_audit.md — Full verification audit trail proof_narrative.md — Plain-language summary proof.json — Machine-readable structured data Generated by Proof Engine v0.10.0.