A 55.5 kg man sits on the stern of a 6.1 m long boat. The prow ofthe boat touches the pier, but the boat isn’t tied. The man notices his mistake,stands up and walks to the boat’s prow, but by the time he reaches the prow, it’s moved 1.43 maway from the pier. Assuming no water resistance to the boat’s motion, calculatethe boat’s mass (not counting the man).