问题409: A car skies down a slope with the gradient 0.4 and the vertical distance moved is 280 m.
A car skies down a slope with the gradient 0.4 and the vertical distance moved is 280 m. Find the
actual distance travelled by the car.
水平位移是280/0.4 = 700m
实际位移是 $\sqrt{700^2+280^2}=140\sqrt{29}$m
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最后修改于6月5日
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