1. The problem statement, all variables and given/known data Hi everyone! I'm struggling to understand how to solve this problem, I searched on the web, but I didn't find anything similar. I have a motor delivering a power P=5kW at n=1500rpm. This motor is mounted on 4 supports, each having a rigidity k=15kN/m. I know that distance between the supports is 250mm. I need to determine the angle of which the motor frame rotates, and the sense of rotation. I've added a drawing, hoping it helps to understand the situation 2. Relevant equations 3. The attempt at a solution I've computed the angular speed in m/s and then I've used the formula for power to determine the torque produced by the motor. At this point I got stuck: I've considered the free body diagram of the disk of the rotor and I've put these forces on it: - m*g acting on the baricenter of the disk (center) - H and V as horizontal and vertical reactions of the bearing on the rotor - M, the motor torque - I*ω' as the inertial reaction of the rotor, then opposite to M My idea was that, to produce an inclination of the frame I must have a non uniformly distributed vertical action on the supports, then I thought there should be an intertial action "m*a" on the baricenter of the rotor, but I can't really find out how to compute it (if that's the way to solve the exercise). Another problem is ofcourse that I don't have any information about the mass and the radius of the rotor, so I can't compute neither I nor ω'. I think I have to use angular momentum equations to compute the intertial reactions, but I really can't find out how to! If anyone could help me I would really appreciate that! Than you!