1. The problem statement, all variables and given/known data 1. A thin disk of mass 6kg and radius 20cm is suspended by a horizontal axis perpendicular to the disk through its rim. The disk is displaced slightly from equilibrium and released. Find the period of the subsequent simple harmonic motion. 2. The bow of a destroyer undergoes a simple harmonic vertical pitching motion with a period of 8.0s and an amplitude of 2.0m. An 80 is standing on a scale in the bunkroom in the bow. What are the maximum and minimum readings on the scale ? 2. Relevant equations T=2*pi*sqrt(m/k) 3. The attempt at a solution 1. So I used the formula T=2*pi*sqrt(I/mgd). I=(1/2)mr^2 since it is a disk. I plugged in numbers and got 0.63 sec which is wrong. Where did I do wrong ?? 2. SO I used F=ma. I found the maximum acceleration to be 1.23 m/s^2. I plugged this in for a. However, I got a wrong answer. How should I fix it. Should I have F= m(g+a) ???