The wheel in Fig. 11-23 (below) has eight equally spaced spokes and a radius of
ID: 2009912 • Letter: T
Question
The wheel in Fig. 11-23 (below) has eight equally spaced spokes and a radius of 30 cm. It is mounted on a fixed axle and is spinning at 2.6 rev/s. You want to shoot a 23 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.
I have come up with 5.52m/s, 6.24m/s, 5.5m/s, and 7.2m/s
I have one more chance on the question and I do not really know how to solve it so an explanation would be great too.
The wheel in Fig. 11-23 (below) has eight equally spaced spokes and a radius of 30 cm. It is mounted on a fixed axle and is spinning at 2.6 rev/s. You want to shoot a 23 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. (a) What minimum speed must the arrow have? I have come up with 5.52m/s, 6.24m/s, 5.5m/s, and 7.2m/s I have one more chance on the question and I do not really know how to solve it so an explanation would be great too.Explanation / Answer
time taken , Rotation speed of wheel and number of spokes 8 equally spaced ist = 1/8 rev / 2.6 rev /s = 1/8*2.6 = 0.048 s a ) minimum speed is vmin = 0.23 m/0.048 s = 4.784 m/s
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