1. The problem statement, all variables and given/known data A rotating disc is driven by a motor that generates constant power P , and expe- riences a frictional drag torque γ ω, where ω is the angular velocity of the disc and γ is a constant. If the moment of inertia of the disc is I , show that the time to accelerate the disc from rest to angular velocity ω is t= -I/2γ ln (1-w^2/wo^2) where ω0 is the value of ω in the steady state. 2. Relevant equations 3. The attempt at a solution Ok so im trying to solve this by writing out a differential equation..Torque = rate of change of angular momentum.. Now I know J = Iw so i can write an expression for rate of change of angular momentum..Just having trouble working out what the net torque is.. it is of the form F - γω..but how can i write an expression for F given the power is constant P? I know the integral of Power dt = the integral of F dw.. Thanks!