physics A levels

The displacement, y, of a body undergoing simple harmonic motion (SHM) is given by the equation y = A sin cl. State what the symbols A and co represent in the equation above. [2 marks] (ii) On the grid provided in Figure 3 on page 15, sketch THREE graphs to show how displacement, y, velocity, v, and acceleration, a, each vary with time, /, for an object undergoing SHM for ONE period of oscillation. Use the same time scale for all three sketches. [4 marks) (c) A light helical spring of spring constant 30 N m" hangs vertically from a fixed support and carries a mass, m - 0.3 kg, at its lower end. (i) . Assuming that Hooke's law is obeyed, calculate the extension produced in the spring. H 12 marks] Calculate the maximum kinetic energy of the mass if it is displaced a further 0 045 m