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InterviewSolution
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A gramophone disc rotates at 60 rpm. A coin ofmass 18 g is placed at a distance of 8 cm from thecentre. Calculate the centrifugal force on the coin |
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Answer» Angular velocity= w= 60rev/min1 revolution= 2pi radian one minute = 60 sec w= 60*2pi/60w= 2pi radian/secmass= 18g = 0.018 kgdistance =r= 8 cm = 0.08 m f= mv^2/r v=rw v^2=r^2w^2f= mr^2w^2/r r in division will be removed by removing square F= mrw^2 f= 0.018*0.08*(2pi)^2square of 2 is 4nd pi^2= 9.87 as per your questionso: 0.018*0.08*4*9.87= 0.05685= 0.057 |
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