Your friend is working on the following problem: "A box m2 sits on top of another box, m1, which is on a horizontal frictionless surface. A rope attached to m1 is pulling with a tension T at angle 0 above the horizontal. Solve for the acceleration of this system. Assume the boxes move together and that T is small enough that the boxes do not lift up from the ground. " (The figure below is given with the problem.) 2 1 Ground Your friend sets up the equations that describe the motion of the boxes and shows them to you. The equations for just the vertical direction are shown below. What question should you ask your friend to help your friend see the error in the equation(s)? _ Fy,1 = T sin 0 - mig + niG = 0 _ Fy,2 = T sin 0 - mag + n21 = 0 I. "Are you sure you have the right trig function for the tension?" Il. "Aren't you missing a normal force?" Ill. "Does the tension act on both objects?"