The frequency of oscillation of a spring-block simple harmonic oscillator is given by f = 2 . such an oscillator composed of a 1 kg block attached to a wall via a spring of stiffness k = 100 n/m starts in equilibrium. a blow from a hammer then sets the block moving inward at a speed of 5 m/s. which of the following best approximates the period and amplitude of the resulting oscillations? a. t= 1.6 s, a = 50 cm b. t= 1.6 s, a = 12.5 cm ° c. t= 0.6 s, a = 50 cm 0 d. t= 0.6 s, a = 12.5 cm