me: ID: A Short Answer 21. Police use the formulas = /30fd to estimate the speed s (in mi/h) at which a car is traveling n Skias a ree after the brakes are applied suddenly. The number fis the coefficient of friction of the road, which is a measure of the "slipperiness" of the road. The table gives some typical estimates for f. Tar Concrete Gravel Dry 1.0 0.8 0.2 Wet 0.5 0.1 0.4 (a) If a car skids 55 ft on dry gravel, how fast was it moving when the brakes were applied? Please round the answer to the nearest integer. mi/h (b) If a car is traveling at 40 mi/h, how far will it skid on dry concrete? Please round the answer to the nearest foot. feet 13.
me: ID: A Short Answer 21. Police use the formulas = /30fd to estimate the speed s (in mi/h) at which a car is traveling n Skias a ree after the brakes are applied suddenly. The number fis the coefficient of friction of the road, which is a measure of the "slipperiness" of the road. The table gives some typical estimates for f. Tar Concrete Gravel Dry 1.0 0.8 0.2 Wet 0.5 0.1 0.4 (a) If a car skids 55 ft on dry gravel, how fast was it moving when the brakes were applied? Please round the answer to the nearest integer. mi/h (b) If a car is traveling at 40 mi/h, how far will it skid on dry concrete? Please round the answer to the nearest foot. feet 13.
Chapter5: Polynomial And Rational Functions
Section5.8: Modeling Using Variation
Problem 46SE: For the following exercises, use Kepler’s Law, which states that the square of the time, T, required...
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ID: A
Short Answer
21. Police use the formulas = /30fd to estimate the speed s (in mi/h) at which a car is traveling n Skias a ree
after the brakes are applied suddenly. The number fis the coefficient of friction of the road, which is a
measure of the "slipperiness" of the road. The table gives some typical estimates for f.
Tar
Concrete
Gravel
Dry
1.0
0.8
0.2
Wet
0.5
0.1
0.4
(a) If a car skids 55 ft on dry gravel, how fast was it moving when the brakes were applied? Please round the
answer to the nearest integer.
mi/h
(b) If a car is traveling at 40 mi/h, how far will it skid on dry concrete? Please round the answer to the nearest
foot.
feet
13.
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