Problem 2: A 40-kg package is moving with an initial velocity along a floor with friction when it hits a pre-loaded spring, initially compressed by 200mm. The package stops after the spring compresses 40mm further. The spring constant is 25 N/mm. A. The initial velocity is 3m/s and the distance D before the package hits the spring is 0.8m. A. How much work is done by the spring? B. What is the initial kinetic energy of the package? C. What is the initial momentum of the package