10.A 0. 15 kg mass on a spring is moving at 4 cm/s when it goes through its equilibrium position. The spring has a spring constant of 15 N/m. a. Calculate the amplitude of the oscillations. b. Calculate the period of the oscillations. c. Write the equation describing the position of the mass as a function of time. d. Calculate the position of the mass at t = 0.05 s. 11. The graph below is a "snapshot" graph for a wave moving with a speed of 6 m/s. 2 y (cm) 1.5 0.5 0 x -0.5 -1 -1.5 -2 a. Calculate the frequency of the wave. b. Write the equation of the wave. c. Calculate the position of the particle at x = 2.5 m when t = 0.8 s