英语翻译
题目
英语翻译
The stopping distance of a car is the number of feet that the car travels after the driver starts applying the brakes.The stopping distance of a certain car is directly proportional to the square of the speed of ther car,in miles per hour,at the rime the brakes are first applied.If the car's stopping distance for an initial speed of 20 miles per hour is 17 feet,what is its stopping distance for an initial speed of 40 miles per hour?
答案
汽车的制动距离是指在司机开始使用刹车后移动的英尺数.当英里每小时进行首次刹车,汽车制动距离与车的速度成正比.如果当汽车初始速度为20英里每小时时它的制动距离为17英尺,那么当汽车初始速度为20英里每小时时,它的制动距离是多少?
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