Question

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 the centrifugal force on the coin.

Answer 1

Given,

Mass,$m=0.018kg$

Radius, $r=0.08m$

RPM, $n=60rpm$

Centrifugal force, $mr{\omega }^2$

$=mr\times {\left(\frac{2\pi n}{60}\right)}^2$

$0.018\times 0.08\times {\left(\frac{2\pi 60}{60}\right)}^2=0.0568N$

Hence, centrifugal force is $0.0568N$