Challenge Problem A block rests on a frictionless table and it connected to a spring with a spring constant of k- 77.7 N/m. A bullet (m-0.145 kg) is shot with a speed of 226.5 m/s directly into the block (M-9.864 kg), and becomes stuck in the block. How long does it take for the combined bullet plus block to compress the spring by a distance of -0.467 m? Express your answer in seconds to four significant figures. mv Answer Check