Bullet Velocity

Bullet Velocity



In This Section Section Home Art History Syllabus Sample Lesson Enter Course Here Before You Begin Quarter 1 + Quarter 2 Resource Room Forensic Science About the Instructor Contact Information Syllabus Sample Lesson Enter the Course How to Work through this Course History of Forensics Crime Scenes Arson Ballistics Blood Splatter Prints Profiling Foreign Languages Spanish I About the Instructor Syllabus Contact Information Sample Lesson Enter the Course Spanish II About the Instructor Syllabus Sample Lesson Enter The Course Media Arts Design Elements for Your Own Business Designing Logos	Bullet Velocity Home > Forensic Science > Enter the Course > Ballistics > Ballistics as a science > Bullet Velocity Bullet Velocity This is when the bullet is traveling through the air. Some factors that affect the travel are retardation and drag. Retardation is the degree of drag slowing down a bullet. Increasing velocity causes an increase in retardation. Drag is the effect of forces pulling on the bullet. For instance, as the bullet spins, wind resistance and gravity act on the bullet to pull it out of its straight line. By spinning the bullet faster, the bullet is less likely to yaw. Yaw is a wobbling effect on the bullet. Increasing the rifling twist from 1 in 12 to 1 in 7 decreases the yaw. We will not worry about retardation or drag in our formulas. We will look at finding kinetic energy. Kinetic energy uses Mass and Velocity. Kinetic Energy (KE) = 1/2 X Mass X Velocity squared. Mass is the same formula as with Muzzle Velocity. Velocity is in feet per second. If BW = 180 grains, M = .82 If velocity (V) = 550 V squared = 302500 (You just take 550 X 550.) KE = 1/2 X .82 X 302500 therefore KE = 124025 foot-pounds