Posted by Adam on .
An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 68.7 cm long and has a mass of 4.69 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
I got an answer of 45 N*m (which is correct) but I am having trouble with the second question:
What is the magnitude of the torque about his shoulder if he holds his arm straight, but 46.6° below horizontal?
I tried the following but I'm stil confused as to what the answer is.
Knowing the angle, I drew a right triangle and used trig to get the distances, and then I did just what I did for the first part