A Lazy Susan is a rotating disk with a mass of 5.52 kg and a radius of 0.250 m. If you push the edge with a 12.4 N force, tangent to the circle, what is its angular acceleration?

Answer 1

Iα = M; where I = 1/2mr² is moment inertia, M = F·r is momentum of force and α is angular accelaration

.α = M/I = Fr/(1/2mr²) = 2F/(mr) = 2·12.4N/(5.52kg·0.250m) = 17.97 rad/s²