1. The problem statement, all variables and given/known data A disc is on a desk, with a rotation point underneath. A string is wrapped around it, and the end of the string has a mass attached to it. The string end is put over a pulley, and when the mass is dropped it causes the disc to rotate. We are given mass of the disc (80g), radius of the disc(4.25cm), height the mass is dropped from (75cm), the time it takes for the mass to hit the ground (2.8 sec) and the thickness of the disc (2.5cm) How can you find the torque on the disc? Thanks 2. Relevant equations t = f x r 3. The attempt at a solution I tried using f = ma to find the force of the disc. (Calculated using kinematics). Then I used the radius of the disc and the calculated acceleration in the torque equation T = F x r, but that's wrong.