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9. (10 pts) A track runner who weighs 750 N is running around a curve at a speed of 4.8 m/s in an arc whose radius, r, is 6.0 m. Find the centripetal force acting on him. 10. (10 pts) A 50 cm rope is tied to the handle of a bucket, which is then spun in a vertical circle. The mass of the bucket is 3.3 kg. What is the minimum speed required such that the rope does not become slack when the bucket reaches the highest point in the circle.
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9) The centripetal force is, mi 750 9.8 (4.8 6.0 -293.877 294 N 10)The Weight is balanced by centripetal force 71 mi mg VE (9.8) (50x10) 2.2136 m/s =2.2 m/s

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