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You should measure straight skid marks of a vehicle at what points when investigating a traffic crash:

A. At the beginning, center, and end of the skid
B. At the beginning and end of the skid
C. Before the skid mark begins and after the skid mark ends

Answer :

Final answer:

To determine the vehicle's speed at the beginning of a skid during a traffic crash investigation, measure the length of the skid marks at the beginning and end of the skid.

Explanation:

Investigating Traffic Crash Skid Marks

When investigating a traffic crash, it is essential to measure skid marks accurately to determine the speed of a vehicle at the beginning of the skid. To do this, you should measure the straight skid marks at the beginning and end. This will give you the length (L) of the skid marks. With this length and the coefficient of friction (μ) between the tires and the road, you can calculate the initial speed (v) of the vehicle using the formula derived from the work-energy theorem. Remember, evidence from skid marks plays a critical role in the reconstruction of traffic accidents and can indicate if a vehicle was speeding before the incident occurred.

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Rewritten by : Jeany

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