Forensic Ballistics: Internal Ballistics and Wound Physics (Deep)
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
24 May 2026
About this mock
UGC-NET Forensic Science Paper II Unit V deep-band drill on internal ballistics and terminal wound physics. Thirty hard questions on primer ignition (anvil compression, lead styphnate detonation, flash duration around 50 microseconds, gas jet transfer to the powder charge), propellant burn kinetics (degressive, neutral and progressive grain geometries, Vieille burn-rate law r = beta P to the n, chamber pressure peak in the 300 to 400 MPa window), gas expansion and barrel time (adiabatic expansion behind the bullet, residual muzzle pressure, muzzle blast formation), recoil mechanics (momentum conservation across bullet, gas and firearm, free-recoil energy formula, stock and muzzle-device mitigation), wound channel physics (permanent cavity from crushed tissue path, temporary cavity from radial hydrostatic stretch), hydraulic shock and remote injury at non-elastic organs, and bullet behaviour in tissue (initial yaw, tumble onset, fragmentation threshold near 700 m/s for 5.56 mm SS109, cavity volume scaling with retained kinetic energy). Calibrated for candidates pushing for top-decile Paper II Unit V scores.
Aimed at MSc Forensic Science students, NFSU and LNJN aspirants, UGC-NET Paper II repeaters, and Bar Council criminal-law candidates revising firearms-injury jurisprudence.
Topics covered:
- Primer ignition mechanics and flash-jet chemistry
- Propellant burn-rate kinetics and chamber pressure curves
- Adiabatic gas expansion and barrel-time dynamics
- Recoil momentum conservation and felt-recoil mitigation
- Permanent and temporary wound cavity physics
- Hydraulic shock and remote organ injury mechanisms
- Bullet yaw, tumble and fragmentation in soft tissue
- Cavity volume scaling with retained kinetic energy
Sit the paper in one timed block to mimic the Paper II Unit V pacing pressure. Allow 30 minutes.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 9 questions
Heard, Brian J. — Handbook of Firearms and Ballistics, 2nd Edition (2008), Wiley-Blackwell
Chapter 5: Internal Ballistics, chamber pressure curves for service ammunition
- cited in 9 questions
Carlucci, Donald E. and Jacobson, Sidney S. — Ballistics: Theory and Design of Guns and Ammunition, CRC Press
Chapter on Interior Ballistics, post-peak gas expansion and bore work
- cited in 7 questions
DiMaio, Vincent J.M. — Gunshot Wounds: Practical Aspects of Firearms, Ballistics, and Forensic Techniques, 3rd Edition, CRC Press
Chapter on Wound Ballistics, permanent vs temporary cavity definitions
- cited in 3 questions
Fackler, Martin L. — Wound ballistics: A review of common misconceptions, JAMA 259 (1988)
Sections on 7.62 NATO and 5.56 NATO behaviour in 10-percent ballistic gelatine, tumble-onset distance
- cited in 1 question
Fackler, Martin L. — Wound ballistics: A review of common misconceptions, JAMA 259 (1988); Bull NY Acad Med papers on tissue-pressure dynamics
Sections on pressure-time history of tissue gunshot pulses, gelatine surrogate measurements
- cited in 1 question
Fackler, Martin L. — Wound ballistics: A review of common misconceptions, JAMA 259 (1988); DiMaio, Vincent J.M. — Gunshot Wounds, 3rd Edition, CRC Press
Sections on cavity-volume scaling with retained KE deposit and the design implications across military and civilian ammunition types
How our mocks are built
Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Forensic Ballistics: Internal Ballistics and Wound Physics (Deep) mock cover?+
UGC-NET Forensic Science Paper II Unit V deep-band drill on internal ballistics and terminal wound physics. Thirty hard questions on primer ignition (anvil compression, lead styphnate detonation, flash duration around 50 microseconds, gas jet transfer to the powder charge), propellant burn kinetics (degressive, neutral and progressive grain geometries, Vieille burn-rate law r = beta P to the n, chamber pressure peak in the 300 to 400 MPa window), gas expansion and barrel time (adiabatic expansio
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on Forensic Ballistics, NET. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.