SOLUTION: [ accident investigators use the formula sqrt(30fd) to determine the speed that a car was traveling in miles per hour by measuring the distance (d) in feet of its skid mark. in thi

Question 815403: [ accident investigators use the formula sqrt(30fd) to determine the speed that a car was traveling in miles per hour by measuring the distance (d) in feet of its skid mark. in this formula f is the coefficient of friction for the type and condition of the road ]

1 write a simplified formula for the speed if f=0.6 for wet asphalt road
2write a simplified formula for the speed if f =0.8 for dry asphalt road
[ 3 investigators determine the speed at the time of an accident to be 50 mph and the distance of the skid marks was 105 feet. determine if the road was wet or dry. explain your answer ]
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
generic speed = sqrt( 30fd )
---
wet speed:
f = 0.6
---
Answer 1:
wet speed = sqrt( 18d )
---
dry speed:
f = 0.8
---
Answer 2:
dry speed = sqrt( 24d )
---
50 = sqrt( (30*105)f )
50 = sqrt( 3150f )
50^2 = 3150f
2500 = 3150f
f = 0.7936507
---
Answer 3:
the coefficient of friction for this particular accident is about 0.8 so the road was dry.
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
When a car traveling on wet pavement at a speed V in miles per hour stops suddenly, it... (answered by Fombitz)

Police use the formula V (L) = sqrt(20L) to estimate the speed of a car in miles per... (answered by josmiceli)

After an accident the police determines the speed at which the car had been traveling by... (answered by stanbon)

My teacher gave us this word problem , please help ! "A police accident investigatore... (answered by drk,Earlsdon)

Solve the problem. Police use the formula s = square root of 30fd to estimate the speed (answered by richwmiller)

using the formula s=2sqrt5x (I am having trouble inserting the radical sign so i used... (answered by Theo)

Investigators at a traffic accident use the equation: D = 0.04v2 + 0.8v where v is the... (answered by stanbon)

How do police determine how fast a car had been traveling after an accident has occurred? (answered by malaydassharma)

. After an accident, how do police determine the speed at which the car had been... (answered by solver91311)