I'm Studying for the ACTAR test! Please help with this practice problem!

16-33: MINI CASE STUDY PROBLEMI: (You may treat this as a mini-test. Problem 25 is worth 15 points; Problems 16-24 and 26-33 are worth Spts each. You must score 75 or higher to pass. Angles must be within 33 degrees to be correct. All other answers must be accurate to within 15%. A westbound automobile (V-2) is struck broadside by a northbound dump truck (V-1), which failed to stop for a red traffic signal. V-1 runs off the road, goes through a ditch, and comes to rest in a nearby parking lot. V-2 spins out after impact, breaking into a restricted roll prior to coming to rest. he driver of the auto is killed the truck driver suffered minor injuries. Both roads bave a posted speed limit of 35 mph. Subsequent inspection of -1 has revealed that the vehicle's brakes were severely defective. You are also given the following information: V-1 V-2 Curb Weight: 23,000 lb. 3,200 lb Average drag factor for V-1 after impact: 0.15 Driver Weight: 200 lb 140 lb. Average drag factor for V-2 during spinout: 0.40 Cargo Weight: 45,500 lb. 50 lb. Average drag factor for V-2 during rollout: 0.10 See the diagram on the following page. It is to scale 1" - 20. Use northbound route 925 as 0 degrees. Answer the following questions 16) Assuming no evasive maneuver on the part of the truck, what was the angle of V-1 at impact? 17) Assuming no evasive maneuver on the part of the car, what was the angle of V-2 at impact? 18) What was the departure angle of V-1? 19) What was the departure angle of V-2? 20) What was the post impact travel distance of V-17 21) What was the post impact spin-out distance of V-2? What was the post impact restricted roll distance of V-2? 23) What was the total weight of V-1? 24) What was the total weight of V-2? 25) What was the impact speed of V-1? 26) What was the impact speed of V-2? (I know, you're not supposed to try to calculate a car's speed in these types of impacts, but give it a shot.) 27) What was the delta V of V-1? 28) What was the delta V of V-2? 29) True or False: From this impact configuration and the over l' crush depth to the side of V-2, it is safe to assume that departure angles will be nearly identical (say within 15 degrees) and post impact speeds Dearly the same (say within 5 mph). 30) True or False From the evidence on the road surface, it appears that the truck had an evasive steer to the left at impact. 31) True or False From the evidence on the road surface, it appears that the car had an evasive steer to the right at impact. 32) True or False: For our calculations, we assumed that V-1 was beading north at impact. If in fact it was travelling a little west of north at impact, this caused us to underestimate the speed of V-2. 33) Which of the following changes in our parameters would cause the greatest change in our calculed V-1 impact speed? a) Adding 5 degrees to V-1's departure angle, b) Adding 5 degrees to V-2's impact angle. c) Adding 5 degrees to V-2's departure angle. d) Adding 0.05 to V-1's post impact drag factor e) Adding 0.05 to V-2's post impact drag factor (both the spinout and the restricted roll). Prob. 16-33 Scale Diagram CASE NO. Q5708768 FATAL ACCIDENT AUGUST 5, 1985 ES VECIEN ASPHALT SHOULDER AT. 925 MB RT. 925 ste www 09 -ZERO PL. V-1 Front Stuffs 'V-2 Eh Scuft TURN LANE V-2 AT REST UTILITY POLE DITCH GRASS BO SMALLWOOD FKWY. W/B GRASS MESIAN WAT REST PARKING LOT LEGEND SCUFF MARK SKIDMARK GOUSES W TREE/BUSH 0 5 10 NOTE: POSITION OF FOLIAGE, SOUTHEAST AND SOUTHWEST CURES OF INTERSECTION, AND V-147 REST APROXIMATED. SCALE Victor Craig 9/4/05 16-33: MINI CASE STUDY PROBLEMI: (You may treat this as a mini-test. Problem 25 is worth 15 points; Problems 16-24 and 26-33 are worth Spts each. You must score 75 or higher to pass. Angles must be within 33 degrees to be correct. All other answers must be accurate to within 15%. A westbound automobile (V-2) is struck broadside by a northbound dump truck (V-1), which failed to stop for a red traffic signal. V-1 runs off the road, goes through a ditch, and comes to rest in a nearby parking lot. V-2 spins out after impact, breaking into a restricted roll prior to coming to rest. he driver of the auto is killed the truck driver suffered minor injuries. Both roads bave a posted speed limit of 35 mph. Subsequent inspection of -1 has revealed that the vehicle's brakes were severely defective. You are also given the following information: V-1 V-2 Curb Weight: 23,000 lb. 3,200 lb Average drag factor for V-1 after impact: 0.15 Driver Weight: 200 lb 140 lb. Average drag factor for V-2 during spinout: 0.40 Cargo Weight: 45,500 lb. 50 lb. Average drag factor for V-2 during rollout: 0.10 See the diagram on the following page. It is to scale 1" - 20. Use northbound route 925 as 0 degrees. Answer the following questions 16) Assuming no evasive maneuver on the part of the truck, what was the angle of V-1 at impact? 17) Assuming no evasive maneuver on the part of the car, what was the angle of V-2 at impact? 18) What was the departure angle of V-1? 19) What was the departure angle of V-2? 20) What was the post impact travel distance of V-17 21) What was the post impact spin-out distance of V-2? What was the post impact restricted roll distance of V-2? 23) What was the total weight of V-1? 24) What was the total weight of V-2? 25) What was the impact speed of V-1? 26) What was the impact speed of V-2? (I know, you're not supposed to try to calculate a car's speed in these types of impacts, but give it a shot.) 27) What was the delta V of V-1? 28) What was the delta V of V-2? 29) True or False: From this impact configuration and the over l' crush depth to the side of V-2, it is safe to assume that departure angles will be nearly identical (say within 15 degrees) and post impact speeds Dearly the same (say within 5 mph). 30) True or False From the evidence on the road surface, it appears that the truck had an evasive steer to the left at impact. 31) True or False From the evidence on the road surface, it appears that the car had an evasive steer to the right at impact. 32) True or False: For our calculations, we assumed that V-1 was beading north at impact. If in fact it was travelling a little west of north at impact, this caused us to underestimate the speed of V-2. 33) Which of the following changes in our parameters would cause the greatest change in our calculed V-1 impact speed? a) Adding 5 degrees to V-1's departure angle, b) Adding 5 degrees to V-2's impact angle. c) Adding 5 degrees to V-2's departure angle. d) Adding 0.05 to V-1's post impact drag factor e) Adding 0.05 to V-2's post impact drag factor (both the spinout and the restricted roll). Prob. 16-33 Scale Diagram CASE NO. Q5708768 FATAL ACCIDENT AUGUST 5, 1985 ES VECIEN ASPHALT SHOULDER AT. 925 MB RT. 925 ste www 09 -ZERO PL. V-1 Front Stuffs 'V-2 Eh Scuft TURN LANE V-2 AT REST UTILITY POLE DITCH GRASS BO SMALLWOOD FKWY. W/B GRASS MESIAN WAT REST PARKING LOT LEGEND SCUFF MARK SKIDMARK GOUSES W TREE/BUSH 0 5 10 NOTE: POSITION OF FOLIAGE, SOUTHEAST AND SOUTHWEST CURES OF INTERSECTION, AND V-147 REST APROXIMATED. SCALE Victor Craig 9/4/05