Car B is travelling a distance 'd' ahead of car A. Both cars are travelling at 60 feet per second when the driver of B suddenly applies the brakes (as a man suddenly appears in the middle of the road from nowhere), causing his car to decelerate at 12 feet per second square. It takes the drives of car A 0.75 sec to react/respond (this is normal reaction time for drivers). When he applies his brakes, he decelerates at 15 ft per second square. a) Calculate the minimum safe distance 'd' between the cars to avoid a collision. b) Calculate the minimum safe distance between two cars such that the two cars minutely collide with each others. During this minutely collision event, the passengers in cars without seatbelt/safety-equipment, does not experience any serious or have no (internal/external) injuries. Calculate the safe distance in both of the cases. Justify your answer by taking into account the effect of impact of force on human body i.e. amount of G's and by calculating the impact of momentums of the cars for second case scenario. Also show the timeline i.e. distance & time graph for both cars collectively on the same graph/figure in the first case scenario. \ –d — B
Car B is travelling a distance 'd' ahead of car A. Both cars are travelling at 60 feet per second when the driver of B suddenly applies the brakes (as a man suddenly appears in the middle of the road from nowhere), causing his car to decelerate at 12 feet per second square. It takes the drives of car A 0.75 sec to react/respond (this is normal reaction time for drivers). When he applies his brakes, he decelerates at 15 ft per second square. a) Calculate the minimum safe distance 'd' between the cars to avoid a collision. b) Calculate the minimum safe distance between two cars such that the two cars minutely collide with each others. During this minutely collision event, the passengers in cars without seatbelt/safety-equipment, does not experience any serious or have no (internal/external) injuries. Calculate the safe distance in both of the cases. Justify your answer by taking into account the effect of impact of force on human body i.e. amount of G's and by calculating the impact of momentums of the cars for second case scenario. Also show the timeline i.e. distance & time graph for both cars collectively on the same graph/figure in the first case scenario. \ –d — B
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Car B is travelling a distance 'd' ahead of car A. Both cars are travelling at 60 feet per second
when the driver of B suddenly applies the brakes (as a man suddenly appears in the middle
of the road from nowhere), causing his car to decelerate at 12 feet per second square. It takes
the drives of car A 0.75 sec to react/respond (this is normal reaction time for drivers). When
he applies his brakes, he decelerates at 15 ft per second square.
a) Calculate the minimum safe distance 'd' between the cars to avoid a collision.
b) Calculate the minimum safe distance between two cars such that the two cars
minutely collide with each others. During this minutely collision event, the passengers
in cars without seatbelt/safety-equipment, does not experience any serious or have no
(internal/external) injuries.
Calculate the safe distance in both of the cases. Justify your answer by taking into
account the effect of impact of force on human body i.e. amount of G's and by
calculating the impact of momentums of the cars for second case scenario. Also
show the timeline i.e. distance & time graph for both cars collectively on
the same graph/figure in the first case scenario. \
–d —
B
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