ccf83dy60d的部落格

標題:

Movable pulley

發問:

I need examples of movable pulley!!!!! Quick!!!!!

最佳解答:

The moter drive will draw up 95 x pi x 65 / 60 = 323.2 mm of rope per second. Note that there are 4 pieces of rope pulling the load, hence if the load goes up by x, then the rope has to be drawn by a length of 4x. Therefore the speed of the load is 323.2/4 = 80.8 mm/s The answer is F. 圖片參考：http://tw.yimg.com/i/tw/ugc/rte/smiley_1.gif

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