1 The acceleration, a, of a mass vibrating on a spring in simple harmonic motion is given by a = -2.5 cos(2nt) Given that at t = 0, v = 0 and displacement x = 0, find an expression for displacement x. 2 The horizontal component of acceleration, a,, of a particle moving with curvilinear motion is given by a, = t Given that when t = 0, the velocity vx - 2 and displacement x = 3, find an expression for displacement x