QA massive disc rotates about a vertical axis at an angular

Last updated: 6/10/2023

QA massive disc rotates about a vertical axis at an angular velocity A smaller disc of mass m and radius r whose axis is strictly vertical is lowered on the first disc The distance between the axes of the discs is d d r and the coefficient of friction between them is Determine the steady state angular velocity of the smaller disc What moment of force m must be applied to the axis of the larger disc to maintain its velocity of rotation constant The radius of the larger disc is R d r The friction at the axes of the discs should be neglected