Physics - Rotation Question with Solution | TestHub

A person of$80 \mathrm{kg}$mass is standing on the rim of a circular platform of mass$200 \mathrm{kg}$rotating about its axis at$5$revolutions per minute (rpm). The person now starts moving towards the centre of the platform. What will be the rotational speed (in$\mathrm{rpm}$) of the platform when the person reaches its centre....