Answer to Question 5

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(a) v = 2pfr = 2 p 1/6 s-1 12 m  = 12.6 m s-1  

 

(b) a = (12.6 m s-1)2 12 m  = 13.2 m s-2

 

(c) R = (72 kg [(12.6 m s-1)2 12 m]) (72 kg 9.8 m s-2)  = 247 N

 

(d) R = (72 kg [(12.6 m s-1)2 12 m]) + (72 9.8)  = 1658 N