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A gramophone disc rotates at 60 rpm . A ...

A gramophone disc rotates at 60 rpm . A coin of mass 18 g is placed at a distance of 8 cm from the centre . Calculate centrifugal force on the coin . Take `pi^(2) = 9. 87` .

Text Solution

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Here ` n = 60 "rpm" = 1 "rps" , m = 18 g `,
`r = 8 cm` .
`F = mr omega^(2) = mr (2pin)^(2)= 4 pi^(2) mrn^(2)`
`4 xx 9.87 xx 18 xx 8 xx 1 = 5685.12 "dyne"` .
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