1. The problem statement, all variables and given/known data State an expression for the vertical force at the elbow joint FE in terms of the other forces acting when the arm is held horizontal with the dumbbell in the hand. 2. Relevant equations No equations needed. 3. The attempt at a solution Since muscles can not expand beyond their resting length, joints and muscles often exert forces that act in opposite directions and thus subtract. Am I even close to what I was asked to answer?