1. The problem statement, all variables and given/known data A car has a total mass of 2000kg, and a ground clearance of 40cm. But some fat dude got in and he made the ground clearance 30cm. What is the spring constant for this bad boy of a car? (The dude was so fat he made the shocks act like springs if you can believe it.) Also, it's a fact that the natural frequency of said springs are .6667 HZ. 2. Relevant equations F = -kx 3. The attempt at a solution So I tried being like: (2000kg)*(9.8m/s^2) = -kx and then I was like: (2000kg + Xkg) * (9.8m/s^2) = -k(x-.1m) I tried solving for k as hard as I could cause I really want it, but there are too many variables and I can't figure out what to do. My physics teacher says he wants me to fail and I'd like to show him that I'm not a total turd. Thank you.