I need help to figure out the torque needed by a motor to lift an arm with fixed weight at the end like in the picture....
Where the green circle is the fixed motor and the arm is welded to the motor shaft and the movement is only 90 degrees goes from vertical to horizontal.
The arm length is 55cm, arm weight is 4kg and the fixed attached weight is 13 kg
I wanna know what is the torque (n-m) required to rotate the arm from a vertical to horizontal position.