ACTAR Mathematical & Physical Principles of Reconstruction

Question 1

What physical principle explains conservation of motion in crashes?

Accepted Answer

Conservation of momentum

Answer

Thermodynamics

Answer

Electromagnetism

Answer

Fluid dynamics

Question 2

What equation estimates speed from skid marks?

Accepted Answer

S = √(30 × d × f)

Answer

F = ma

Answer

d = rt

Answer

V = IR

Question 3

What does Newton’s Second Law state?

Accepted Answer

Force equals mass times acceleration

Answer

Action equals reaction

Answer

Energy equals mass times velocity

Answer

Power equals work divided by time

Question 4

Why is drag factor important?

Accepted Answer

It influences deceleration rate

Answer

It determines noise level

Answer

It controls airbag deployment

Answer

It measures fuel usage

Question 5

What unit is acceleration typically measured in?

Accepted Answer

Feet per second squared

Answer

Pounds

Answer

Degrees

Answer

Lumens

Question 6

What role does mass play in crash energy?

Accepted Answer

Increases kinetic energy

Answer

Reduces speed

Answer

Lowers risk

Answer

Increases air pressure

Question 7

How is kinetic energy calculated?

Accepted Answer

velocity / time

Answer

1/2 × mass × velocity²

Answer

mass × time

Answer

mass × gravity

Question 8

What is a projectile motion example in reconstruction?

Accepted Answer

Launched vehicle off roadway

Answer

Skid mark

Answer

Airbag deployment

Answer

Seat belt buckle

Question 9

Which factor affects braking distance?

Accepted Answer

Road surface condition

Answer

Color of vehicle

Answer

Type of headlights

Answer

Exhaust size