Skid

Question 1

SKI D TEST

Answer 1

♦ Vehicle in proper condition
♦ Surface in question adjacent to the scene
♦ Known speed
♦ Panic stop
♦ Measure distance
♦ Drag factors are used with suspect skid marks to determine minimum speeds

Question 2

SKI D MARK IDENTIFICATION

Answer 2

♦ Side skid
♦ Locked wheel skid
♦ Impending skid
♦ Centrifugal skid
♦ Acceleration skid

Question 3

MEASURING SKID MARKS

Answer 3

♦ Measuring tape
♦ Roll-O-Meter
♦ Identification of the “fade” portion of the skid
• Fade is the early or beginning portion of a skid mark that is the first part of the mark to disappear.

Question 4

NEWTON’ S LAW!

Answer 4

!

Question 5

♦ Newton’s First Law of Motion

Answer 5

• Every object remains in a state of rest or uniform motion (constant velocity) unless it is acted upon by an external unbalanced force

Question 6

♦ Newton’s Second Law of Motion

Answer 6

• A body of mass m subject to a force F undergoes an acceleration a that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass, i.e., F = ma

Question 7

♦ Newton’s Third Law of Motion

Answer 7

• States, for every action (force) in nature there is an equal and opposite reaction