1. The problem statement, all variables and given/known data A square plate has a side length of 1.2 m. An applied torque of 300 N · m gives the plate an angular acceleration of 4.8 rad/s2 about an axis through the centre of the plate. Determine the plate’s mass. 2. Relevant equations t = lα l = 1/12M(l^2 + w^2) 3. The attempt at a solution I substituted the second equation into the first and rearranged to isolate mass getting M = t / (1/12 * (1.2^2 + 1.2^20) * (4.8 rad / s^2)) = 260.42 kg, or 2.6x10^2 kg I'm just wondering if I've done this question correctly.