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Triple the speed means 3^2 times the stopping distance.manelgirona wrote:If the distance required for an automobile to stop varies directly as the square of its speed, what is the distance required for an automobile driven at 60 kilometers an hour to stop if it takes 10 meters to stop the automobile at 20 kilometers an hour?
a) 30 meters
b) 36 meters
c) 60 meters
d) 90 meters
e) 120 meters
D = function(v^2)manelgirona wrote:If the distance required for an automobile to stop varies directly as the square of its speed, what is the distance required for an automobile driven at 60 kilometers an hour to stop if it takes 10 meters to stop the automobile at 20 kilometers an hour?
a) 30 meters
b) 36 meters
c) 60 meters
d) 90 meters
e) 120 meters
