nx_acceleration_test.nx

nx_acceleration_test.nx -- acceleration vector ops + Newton's second-law roundtrip composition with nx_force. Closed-form invariants (Q14 m/s² unless noted): (a) Zero magnitude == 0. (b) Earth gravity = (0, 0, -9.80665 m/s²) → fz_q14 ≈ -160665. (c) Gravity magnitude ≈ 160665 Q14 (= 9.80665 m/s² × Q14_ONE). (d) 3-4-5 triangle in acceleration space. (e) Add: (1, 2, 3) + (4, 5, 6) = (5, 7, 9). (f) Scale by 2.0 (32768 Q14) doubles each component. (g) Newton's second law roundtrip: gravity × 1 kg ≈ matches nx_force_gravity_on_kg(1 kg). Allows ±2 Q14 tolerance for the two-step Q14 chain (mass×accel/Q14_ONE). (h) F = ma for 5 kg at acceleration (0, 0, -10 m/s²) → F ≈ (0, 0, -50 N). (i) Verdict name lookup non-NULL. expect_exit: 0 license_tier: ORIGINAL