Question

What is the torque on the bar?

Answer 1

Take a look at the image. At the point B a motor is spinning really fast in anticlockwise direction. The motor should be connected to a propeller (I didnt draw it) that will pull the bar upwards but let's suppose the propeller is not connected and the motor is just spinning really fast at X rpm.

A person is holding the bar at position A. What torque or force will the person at A feel? The bar has length L. I know if I connect the propeller the bar will be pulled upwards but I am pretty sure it's gonna generate a "reaction torque" in the bar that will be transmited to the person holding at A.