A ballistic pendulum is used to measure the speed of bullets. It comprises a heavy block of wood of mass M suspended by two long cords. A bullet of mass m is fired into the block horizontally. The block, with the bullet embedded in it, swings upward (see figure below). The center of mass of the combination rises through a vertical distance h before coming to rest momentarily. In a particular experiment, a bullet of mass 44.0 g is fired into a wooden block of mass 10.2 kg. The block-bullet combination is observed to rise to a maximum height of 20.4 cm above the block's initial height. M (a) What is the initial speed of the bullet? m / s (b) What is the fraction of initial kinetic energy lost after the bullet is embedded in the block? (Enter your answer to at least three significant figures.) KEm - KEM+m = KE m