Hello, 1. The problem statement, all variables and given/known data A gearbox and flywheel are as shown in FIGURE 4. The output shaft rotates in the opposite direction to the input shaft at 5 times its speed. The gearbox has an efficiency of 92%. If the flywheel is solid, has a mass of 50 kg, a diameter of 1.5 m and is to accelerate from rest to 300 revs min–1 in 1 minute: (a) Calculate the torque required at input T1. (b) Calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque Th). Show the direction of the holding torque applied to the shaft with the aid of a sketch. (c) Plot a graph of the input power against time when taking the flywheel from rest to 300 revs min–1. 2. Relevant equations I am having trouble with (c) not sure how to tackle this part have all the answers for (a) and (b) 3. The attempt at a solution No idea please help. Regards.