Asked by K
A car with good tread can stop in less distance than a car with poor tread. A model for the stopping distance d, in feet, of a car with good tread on dry cement is
d = 0.04v2 + 0.5v,
where v is the speed of the car in miles per hour. If the driver must be able to stop within 65 ft, what is the maximum safe speed of the car? Round to the nearest whole number.
d = 0.04v2 + 0.5v,
where v is the speed of the car in miles per hour. If the driver must be able to stop within 65 ft, what is the maximum safe speed of the car? Round to the nearest whole number.
Answers
Answered by
bobpursley
d=65ft=.04v^2+.05v
put this into quadratic form, and use the quadratic equation, solve for v.
put this into quadratic form, and use the quadratic equation, solve for v.
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