a mass, m, oscillating on a horizontal spring is located at (t) a cos(ut), where w = and t is the period of the oscillation. for each question asking about a time t below find the first time, expressed in units of t, after t = 0 when the question is satisfied. (a) at what time t is x(t)- /3 七 2. cos- c) t (b) in terms of k, m, and a, write an expression for the maximum speed of the mass, umar /3 /4 (c) what is vz in terms of unaz when