# Does it matter where between the axle and rim of the wheel you aim?

The wheel in Figure has eight equally spaced spokes and a radius of $$30 cm$$. It is mounted on a fixed axle and is spinning at $$2.5 rev/sec$$ You want to shoot a $$20 cm$$ long arrow parallel to this axle and through the wheel without hitting any of the spokes. Assume that the arrow and the spokes are very thin. What minimum speed(in m/sec) must the arrow have?

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