So we have a helicopter with a blade that has the moment of inertia "I" that is "2R" long and is spinning at an angular velocity [tex]\omega[/tex]. To stabilize the aircraft, the tail ruder must exert an equal an opposite force. Can someone point me in the direction of how to calculate the force needed? I'm thinking conservation of angular momentum, so I want to say F=I[tex]\omega[/tex]. But I don't believe that's correct. So I started thinking energy. F=1/2I[tex]\omega[/tex].^2 Which still seems funny. It's a problem I invented to test my understanding and prepare for the final, so if I'm missing a variable that would make this calculation easier let me know. Thank you!