1. During this reverse fly exercise, each dumbbell has a mass of 9 kg. The length of your arm is 0.82m. Body a. On each image, draw and label the force of gravity and the force of the muscle. b. How much force is the dumbbell applying when held in a static position? (hint: the acceleration of gravity is -9.8 m/s) Shoulder joint c. When your arm is parallel to the ground (as pictured), how much torque is produced around the shoulder? Body Arm d. When you lower your arm down 60 degrees from the parallel position, how much torque is produced around the shoulder? Shoulder joint Arm