1. The problem statement, all variables and given/known data The terminal speed of a freely falling object is v_t (assume a linear form of air resistance). When the object is suspended by a spring, the spring stretches by an amount a. Find the formula of the frequency of oscillation in terms of g, v_t, and a. 2. Relevant equations the linearly damped force = -cx' 3. The attempt at a solution I started by writing the equation, x'' + cx'/m + kx/m - mg = 0 Is this the correct way to start the problem and where would I go to next? I know that undamped frequency is equal to sqrt(k/m) but I'm not sure what to do with the equation. I'm stuck!