1.A mass on a spring oscillates horizontally on africtionless surface with an amplitude of 15cm, a frequency of 0.2Hz. (a) Whatis the displacement of the mass at t=3.1 s? (b) How many oscillations has itmade since t=0? Use the equation of a wave to solve the problem. (c) Describehow the mass’ position varies with time in the course of oscillation? Show theequation of motion for each unit of time? (15pts)
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