1. The problem statement, all variables and given/known data Not really HW, just revision. A shaft rotating at 3000 revolutions per minute is transmitting power of 10000 watts. find the size of the driving couple. 2. Relevant equations Total wrk done by couple = 2.F.r.θ Work = Torque . θ ( angle of rotation ) Power = work done / time 3. The attempt at a solution 60 seconds = 3000 revolutions 1 second = ? Ans came to 50 Using ω = 2∏f resulted in ω = 100∏ Power = (Torque . θ)/t where θ/t = ω Subject of the formula gave me 9.54 as an answer. When it should be 32Nm What have I done wrong?