7) The force of the deltoid is greater than / less than (circle one) the weight of the arm. Use
the idea of \"lever arm\" to explain why this answer makes sense.
8) Now consider the force on the arm by the shoulder joint. For $F_{net, x}$ and $F_{net, y}$ to both be
zero, the shoulder joint must pull to the left / push to the right (circle one) on the arm,
and the shoulder joint must push down / up (circle one) on the arm.
9) Does your extended free body diagram need a revision? If so, do that now.
10) Fill in the static equilibrium conditions for forces, $F_{net, x} = 0$ and $F_{net, y} = 0$, with the details
of this problem and then solve for $N_x$ and $N_y$. Your answers should be expressions in terms
of the \"knowns\"
11) Plug in the values given on the previous page for the \"knowns\" to find values for $N_x$ and $N_y$.
12) As a final test to see if you've made any mistakes, treat the center of mass of the arm as the
axis of rotation and compute $\tau_{net} = \sum_i \tau_i$. If you haven't made any mistakes, this sum
should be zero (because it's a static equilibrium situation!)
