Math 308, Matlab assignment 3 due March 26 in class Summary: Math 308, Matlab assignment 3 due March 26 in class 1. A mass of 1 kg is attached to an (idealized) spring with the spring constant 100 N/m2 and zero damping. The mass is at rest at the equilibrium position of the spring. Then, starting at time 0, an external force cos 9t is applied to the mass. (a) Use dsolve to find the position of the mass as a function of time. Write down the formula in your report. (b) Use ezplot to plot your solution on the interval [-10, 10]. If you do this correctly, you should observe the phenomenon of "beats". It is encountered in practice with speakers that have feedback. 2. A mass of 1 kg is attached to a spring with the spring constant 5 N/m2 and the damping constant 2 N/m. The mass is at rest at the equilibrium position of the spring. Then, starting at time 0, an external force cos t is applied to the mass. (a) dsolve does not work on this problem (try it if you want), so we will have to use a numer- ical solver ode45. First, we need to write the second order ODE my + by + ky = F(t) as a system of two first-order ODE u1 = u2, Collections: Mathematics