SOLUTION: The stopping distance of (s) of a car varies directly as the square of it's speed (v). If a car traveling at 30 mph requires 63 ft to stop, find the stopping distance for a car tra

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Question 240732: The stopping distance of (s) of a car varies directly as the square of it's speed (v). If a car traveling at 30 mph requires 63 ft to stop, find the stopping distance for a car traveling at 50 mph.


Answer by ankor@dixie-net.com(7696) About Me  (Show Source):
You can put this solution on YOUR website!
The stopping distance of (s) of a car varies directly as the square of it's speed (v).
If a car traveling at 30 mph requires 63 ft to stop,
:
find the stopping distance for a car traveling at 50 mph.
s = stopping dist at 50 mph
:
63%2Fs + 30%5E2%2F50%5E2
:
63%2Fs + 900%2F2500
cross multiply
900s = 63*2500
s = 157500%2F900
s = 175 ft