A 4.80 kg block is suspended from a spring with k = 400 N/m. A 56.0 g bullet is fired straight up into the block from directly below with a speed of 162 m/s and becomes embedded in the block.
(a) Find the amplitude of the resulting simple harmonic motion.
(b) What percentage of the original kinetic energy of the bullet is transfered to mechanical energy of the oscillator?