a bullet with mass 20 grams and velocity 100 m/s collides with a wooden block of mass 2 kg. the wooden block is initially at rest, and is connected to a spring with k = 800 n/m. the other end of the spring is attached to an immovable wall. what is the maximum compression of the spring? note: you may assume that the spring is massless and that the collision between the bullet and the wooden block is completely inelastic.