Question

A 15 year old girl is riding on a playground merry-go-round, being pushed around by her friend, similar to that pictured above. The rider has a mass of 50.0 kg and a two handed grip strength of 445 N. The coefficient of friction between her and the merry-go-round is 0.100. Her friend spins her at a rate of 40 rev/min. 13. What is the frictional force, f, acting on the girl? Answer (4 points): f= 14. What is the angular velocity, co, in radians/second? Answer (4 points): 6 = 15. What is the tangential velocity, w,, of the girl? Answer (4 points): v,= 16. What is the total centripetal force, Fco she needs to exert to not fly off of the merry-go-round? Answer (4 points): F. = Points on page: 16 Subtotal: 96 17. Given the frictional force and her grip strength, is the girl able to stay on the spinning merry-go-round? Answer (4 points):

Answer 1

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GI 13) frichand force (fa)ung = 0·lx sox9& f = 49N) And 14) Angular velocity (0) = 40 let = 40 x 21 = 4.18 and - 1 15) tangential velocity (46) = of Aul. 16) Fcentripetal= fr= 49N) Aud Fentripetal - mW ²R #Radius of disc is not given?