일반물리학 1 — Fluids: Problem 6

6 A small solid ball is released from rest while fully submerged in a liquid and then its kinetic energy is measured when it has moved 2.0 cm in the liquid. Figure 14-24 gives the results after many liquids are used: The kinetic energy $K$ is plotted versus the liquid density $\rho_{liq}$, and $K_s = 2.4 \text{ J}$ sets the scale on the vertical axis. What are (a) the density and (b) the volume of the ball?