Normal No Spacing Heading = Paragraph Styles The output from a model for the vibration of the tip of a beam is shown in Figure 2. Velocity (mm/s) -0.5 Time (s) Figure 2 Velocity of the beam tip as a function of time This behaviour can be reduced to an expression for the velocity as a function of time: u (t) = e- sin (2uft) where k = 0.7s- and f = 1.5 Hz. a. Calculate the values of t in the interval t = 0 s to t = 1 s for which the value of v(t) is zero. (Hint: consider values at which a sine function is zero and consider if the exponential function can be zero.) estigate