Hi all, this is not actually homework or similar but the board seemed as the appropriate place for the question. I have an arm of 1m length pointing upwards from a rotation axis, on the end of the arm is a mass of 1kg, upon release the arm starts rotating downwards due to gravity (no other forces). What is the average torque produced from the topmost to the bottommost position. I haven't been doing physics calculations for like 10 years now so am pretty rusty. I can calculate the torque for a force acting in the direction of rotation, but since the force vector and the arm vector angle changes I'm stuck.