Police can estimate the speed of a vehicle before the brakes are applied using the formula 0.75d=(s^2)/(30.25) where s is the sp

Question

2 years ago

7

Police can estimate the speed of a vehicle before the brakes are applied using the formula 0.75d=(s^2)/(30.25) where s is the sp

eed in miles per hour and d is the length of the vehicle’s skid marks. What was the approximate speed of a vehicle that left a skid mark measuring 140 feet?

Mathematics

1 answer:

iren2701 [21] · Answer 1 · 2021-12-04T10:31:48+03:00

iren2701 [21]2 years ago

8 0

We know that <span>0.75d=(s^2)/(30.25) , so for d=140ft
0.75 x 140= </span>(s^2)/(30.25) implies 0.75 x 140 x 30.25)= (s^2), and then
s= sqrt( 0.75 x 140 x <span>30.25)=56.35 miles /hour</span>