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 (see the figure). You find that the slope of the hill is 8-12.0°, that the cars were separated by distance d = 21.0 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 vo= 16.0 m/s. With what speed did car A hit car B if the coefficient of kinetic friction was (a) 0.520 (dry road surface) and (b) 0.110 (road surface covered with wet leaves)? B (a) Number i Units (b) Number Units A

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 (see the figure). You find that the slope of the hill is 8-12.0°, that the cars were separated by distance d = 21.0 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 vo= 16.0 m/s. With what speed did car A hit car B if the coefficient of kinetic friction was (a) 0.520 (dry road surface) and (b) 0.110 (road surface covered with wet leaves)? B (a) Number i Units (b) Number Units A