Social Work homework help. In the figure below, block 2 of mass 2.0 kg oscillates on the end of a spring in SHM with a period of 20 ms. The position of the block is given by x = (1.0 cm) cos(?t + ?/2). Block 1 of mass 5.0 kg slides toward block 2 with a velocity of magnitude 6.0 m/s, directed along the spring’s length. The two blocks undergo a completely inelastic collision at time t = 5.0 ms. (The duration of the collision is much less than the period of motion.) What is the amplitude of the SHM after the collision?