SOLUTION: The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 50 mph can stop in 110 ​ft, how many feet will

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Question 1101612: The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 50 mph can stop in 110 ​ft, how many feet will it take the same car to stop when it is traveling 100 ​mph?
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
where is the
constant of proportionality



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The car will stop in 440 ft
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Note that the units on the left must be
the same as the units on the right
[ ft ] = [ k ] x [ mi^2 / hrs^2 ]
So in order to balence the units,
must have units of:
[ [ ft x hrs^2 ] / [ mi^2 ]

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