Movable pulley
回答 (1)
2008-12-12 5:27 am
✔ 最佳答案
The moter drive will draw up95 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.
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