A light vertical spring of force constant $1000\ \text{N/m}$ stands on the floor. A block of mass $2\ \text{kg}$ is dropped from rest from a height of $40\ \text{cm}$ above the top of the spring, as shown in the figure. It lands on the spring and compresses it. Taking $g = 10\ \text{m/s}^2$, the largest compression of the spring is closest to

Fig. 1: A 2 kg block held 40 cm above the top of a vertical spring of force constant 1000 N/m standing on the floor.