Classical-Relativistic Momentum Gap Three-Row Scan
Restoring the classical momentum label chapter six turns off shows the relativistic correction growing with both speed and mass. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Chapter three's own example is this scan's first row
Chapter three cited this exact case once: mass 4 kg at the slower speed gives classical momentum 12 kg m/s against the checked relativistic momentum 15 kg m/s, a gap of 3.
15−12=3
Neither chapter five nor six ever displayed this gap again
Chapter five's mass scan and chapter six's energy-triangle scan both compute the same momenta at these masses, but chapter six explicitly turns the classical label off. Restoring it across three rows shows the gap growing with both speed and mass.
Doubling mass at the same speed doubles the gap too
The third row keeps the faster gamma and doubles mass to 6 kg. Classical momentum doubles to 24 kg m/s, relativistic momentum doubles to 40 kg m/s, and the gap doubles too, to 16.