Ch.4 - Kinematics

Question 0

What is Newton’s 1st law of motion?

Answer 0

A body at rest will remain at rest and a body in motion will remain in motion unless acted on by an outside force.

Question 1

What are the 3 impacts involved in a vehicle collision?

Answer 1

1. The impact of the 2 objects
2. The impact of the occupants into the vehicle
3. The impact of vital organs inside the occupants

Question 2

What is the formula for kinetic energy?

Answer 2

KE = 1/2M x V*V

Question 3

What are the 2 types of cavities in a penetrating trauma such as a gun shot wound? What is this effect called?

Answer 3

Temporary cavity
Permanent cavity
Cavitation

Question 4

What type of trauma has cavitation?

Answer 4

Penetrating and Blunt

Question 5

What are the 2 forces involved in blunt trauma impact?

Answer 5

Shear and compression.

Question 6

Name and briefly describe the 5 types of blast injuries

Answer 6

• Primary: produced by contact of blast shockwave with body
• Secondary: ballistic wounds produced by objects hurled by the blast
• Tertiary: individual strikes another object after being propelled by the blast
• Quaternary: other related injuries, illness or diseases
• Quinary: injuries from specific additives such as radiation or bacteria