A 1 lb weight is suspended from a spring. Let y give the deflection (in inches) of the weight from its static deflection position, where “up” is the positive direction for y. If the static deflection is 24 in, find a differential equation for y. Solve, and determine the period and frequency of the SHM of the weight if it is set in motion.
To my understanding, the initial condition is y(0) = 24. I have a differential equation of the form $my'' + ky = 0$, and I know that m = 1, but how do I find k?