I fire a bullet at a ballistic pendulum. The large block of wood has a mass M2 = 3.000 kg, and the bullet has a mass of m1 = 30.0g. The bullet completely penetrates the wood and emerges with a speed of vf = 80.0 m/s. The wood, as part of a pendulum, swings up to a maximum height of h = 7.00 cm.
(a) Determine the speed of the block of wood after the bullet has passed through it.
(b) What is the speed of the bullet just before it hits the block?