i.) Draw a free body diagram including a Cartesian coordinate axes and the direction of the
acceleration for each individual mass.
ii.) Write down Newton's 2nd Law and with correct force components (e.g. $f_s$, $f_k$, $f_r$, N, W, $F_s$, T, a, $\theta$,
constant, and parameters provided in the question).
a) (15 pts) Box A sits on top of box B on a rough inclined plane. A string is holding Box A. Both
boxes are at rest. There are friction between the boxes. Also, write down the action reaction pair(s).
b) (10 pts) A box (mass M) is pushed by a force and compressed the spring to a stop on a
frictionless surface.