You testify as an \"expert witness\" in a case involving an accident in which ca

Question

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is ? = 12.0

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is ? = 12.0 degree, that the cars were separated by distance d = 25.5 m when the driver of car A put the car into a slide (it lacked any automatic anti-brake-lock system), and that the speed of car A at the onset of braking was v0 = 17.5 m/s. With what speed did car A hit car B if the coefficient of kinetic friction was 0.60 (dry road surface)? What was the speed if the coefficient of kinetic friction was 0.10 (road surface covered with wet leaves)?

Explanation / Answer

First we find the grade of the road. The slope is 12

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