What is the magnitude of the torque about his shoulder

1. Nov 22, 2008

leisiminger

An athlete at the gym holds a 4.0 steel ball in his hand. His arm is 70 long and has a mass of 4.0
What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
What is the magnitude of the torque about his shoulder if he holds his arm straight, but 50 below horizontal?

I'm lost

2. Nov 22, 2008

LowlyPion

Re: Torque

What is the definition of Torque?

That would be a good start.