An object oscillates with simple harmonic motion along the x axis. Its position varies with time according to the equation x(m) = 4 cos(nt), where x in m and / is in seconds. Determine the 20) Amplitude. a) 6m b) 5 m c) 4 m d) 3 m 21) The angular frequency a) 3.14 rad/s b) 6.28 rad/s c) 9.42 rad/s d) 12.56 rad/s 22) Frequency. a) 0.9 Hz b) 0.8 Hz c) 0.6 Hz d) 0.5 Hz 23) Period of the motion. a) 10 s b) 8s c) 4s d) 2s 24) Maximum acceleration a) 10 m/s b) 39.4 m/s c) 53.2 m/s- d) 64.6 m/s