Final answer:
Using the length of skid marks to determine vehicle speed requires additional information such as coefficient of friction and vehicle mass. Without this, it is not possible to determine the speed, and hence the answer is that there is not enough information.
Step-by-step explanation:
The question presented requires us to determine the speed of the vehicle before the brakes were applied using the length of the skid marks. To calculate this, we can use principles from physics, involving the work-energy theorem and the coefficient of friction. Given that we only have the length of the skid marks and lack other necessary information such as the coefficient of friction or the mass of the vehicle, we cannot accurately answer the question.
However, if we were given the coefficient of friction and the mass of the vehicle, we could use the formula: speed = √(2 × coefficient of friction × acceleration due to gravity × skid distance) to calculate the initial speed. Since these variables are not provided, the correct answer to the question is A) Not enough information to determine.