Which of the following best describes the amplitude of a wave? a. the time for a particle to undergo one complete wave oscillation b. the distance between two adjacent troughs of the wave c. the maximum displacement of a particle as the wave passes d. the number of wave troughs that pass a position in one second

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.