1. The problem statement, all variables and given/known data What is the brake torque and the needed force to stop the drum. Photo of problem: https://gyazo.com/5c814dc6791b29362cc2835dacf7005a Data not on photo: Max pressure is 0.7MPa and friction coefficient is 0.2. 2. Relevant equations T=(P1-P2)D/2 p=2P/bD dP-fdN=0 dN=Pdθ 3. The attempt at a solution The only thing I've been able to do is use p=2P/bD and rearange it to get F=8.68N I am unsure of what dθ is supposed to be since the band lifts up on a portion of the drum.