Question

Name 37) You have been hired as an expert witness in a crash investigation. Car A of mass 1900 kg crashed into stationary car B of mass 1000 kg. You measure the coefficient of kinetic friction between the locked tires a was in park so the tires did not turn). Car A hits car B, locking bumpers so that they s bef nd the road to be 0.6 (car B kid off together. They skid 20 m ore coming to a sto p. a) (8 pts) find the speed in km/h of Car A and B (stuck together, so one number) immediately was hit, before they were slowed down by friction. [If you do not have an answer for part a you may assume 20 km/h to continue the problem. Stat had before striking car B. [If you do not have an answer for part b you may assume 50 km/h to continue the problem. State you are doing this] c) (5pts) It turns out car B was just over a hill, so that car A could not have seen it until it was only 40 m away. How much time did the driver of car A have to react to seeing car B2 d)(4pts) discuss whether or not your answers to parts a and b make sense, keeping in mind that 90 km/h is about 55 mph. If you didn't answer a certain part, or used the provided values, tell what type of values would make sense e you are doing this] b) (6 pts) find the speed in km/h car A must have

Answer 1

Souliion 10o+1000 20o На 06 wtsk done341-040 ooles knikc Eaesy usoud have been dtulatd by audion 2900 15.336mlsec S-3M SE Spe 552khn, bonkon ot i oenlumm gjves us. 2900 900 23.40 mlsec VA315-33 clislance speed 90 2340 09sec CamScanne

,ne oe can see he. Speed o cas A comes ot to be asound 35 kMPH uhich1s vesu hiah ondit Collides meless. Since cax A s ea as we as savelling at high Speed he values oblained in pozt a and b abe quite acceplable. s Scanned with CamScanner