\begin{problem*}{9.56}
-Figure P9.56 shows three points in the operation of the ballistic
+Figure~P9.56 shows three points in the operation of the ballistic
pendulum discussed in Example 9.6 (and shown in Fig.~9.9b). The
-projectile approaches the pendulum in Figure P9.56a. Figure P9.56b
+projectile approaches the pendulum in Figure~P9.56a. Figure~P9.56b
shows the situation just after the projectile is captured in the
-pendulum. In Figure P9.56c, the pendulum arm has swung upward and
+pendulum. In Figure~P9.56c, the pendulum arm has swung upward and
come to rest at a height $h$ above its initial position. \Part{a}
Prove that the ratio of kinetic energy of the projectile-pendulum
system immediately after the collision to the kenetic energy