1. Consider two particles Aand A2 that are connected to each other by a rigid massless rod of length 1 m. Their masses are 2m kg and m kg, respectively. Suppose that they are undergoing a rectilinear motion: r = xi, r2 = (x + l)i. Suppose that a force F(t) i is applied to A2. Draw the free-body diagrams for each particle. Apply Newton's second law to each particle. Also, invoke Newton's third law. Solve for the acceleration *. (a) Draw the free-body diagram for the body {A, A2} and apply Euler's first law. Solve for the acceleration. j Az g (b) Read MKB Problem 3/4, p.P-41. Label the truck A and the trailer B. Choose an origin and a basis {i, j}. 3/4 The 10-Mg truck hauls the 20-Mg trailer. If the unit starts from rest on a level road with a tractive force of 20 kN between the driving wheels of the truck and the road, compute the tension T in the horizontal drawbar and the acceleration a of the rig. 20 Mg 10 Mg PROBLEM 3/4 (c) Draw a free-body diagram of the combined body C = A UB, and write all of the external forces in vector form. Solve for the acceleration of C. 1 (d) Draw a free-body diagram of the trailer B and solve for the tension in the drawbar between A and B.