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sara1990
02-26-2012, 12:21 AM
It is important for drivers to know how much time they need to come to a safe stop. the time needed to stop depends on the speed of the vehicle.

the following table gives safe stopping distances on dry pavement.

It is important for drivers to know how much time they need to come to a safe stop. the time needed to stop depends on the speed of the vehicle.

the following table gives safe stopping distances on dry pavement.


Speed (km/m)

Reaction-time distance (m)

Braking distance
(m)

Overall stopping distance (m)




0.00

0.00

0.00



20

8.33

1.77

10.10



40

16.67

7.09

23.77



60

25.00

15.96

40.96



80

33.33

28.38

61.71



100

41.67

44.35

86.02










A.what type of function best models the reaction-time distance for the given speeds?

B.sketch a graph and deremine an equation for the type of function you chose in part A, using the data in the table.

C.what type of function best models the braking distance for the given speeds?

D.sketch a graph and determine an equation for the type of function you chose in part C, using the data in the table?

E. do any of the three distances in the table increase at a cnstant rate?

F.what other factors, in addition to the speed of the vehicle, may affect the overall stopping distance?

G.use the graphs and equations you found to predict the reaction times,braking distances, and overall stopping distances, in metres , for speeds of 70 km/h and 120 km/h.

pappus
02-26-2012, 03:25 AM
It is important for drivers to know ...
F.what other factors, in addition to the speed of the vehicle, may affect the overall stopping distance?

...

1. Construction of the road surface: Tar macadam, concrete, cobble stone,...
2. Condition of the road surface: dry, moist, wet, covered with ice, snow, mud, dead frogs, ...
3. Age of the tyres, age of the driver, age of the tired, ...
4. Condition of the windshield: Clean, scratched, covered with moist, ice, snow, water, dead flies, ...
5. Time of the day
6. Radioprogram
7. Number and kind of passengers: 4 hungry and tired kids and ...
8. Kind and condition of the load.

With the first mile you drive you are going to write the book of excuses.