A block of mass 0.3 kg on a horizontal surface is attached to a horizontal spring of negligible mass. The other end of the spring is attached to a wall, and there is negligible friction between the block and the horizontal surface, The block-spring system is released from rest and undergoes simple harmonic motion. The graph shows the horizontal position of the block as a function of time. How could the syudent estimate the total mechanical energy of the system by using the graph and the known information about the syste