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Chapter 11 - 11.6

6. (a) To avoid touching the spokes, the arrow must go through the wheel in not more than

∆ t =

1 / 8rev

2 . 5rev / s =0 . 050 s .

The minimum speed of the arrow is then

0 . 050 s =400 cm / s=4 . 0m / s .

(b) No – there is no dependence on radial position in the above computation.

v min = 20cm