1. The problem statement, all variables and given/known data A dog weighing 5 kg is at the back of a boat of length 4m and weight 20 kg as shown below. Initially the dog is 8 m from shore. If the dog walks to the front of the boat, how far from shore will he be? [PLAIN]http://img72.imageshack.us/img72/6067/70134062.gif [Broken] Correct Answer: 4.8 m 3. The attempt at a solution I absolutely have no idea on how to apprach this problem. The velocity of dog and box are not given so it's impossible to use equations of momentum. I appreciate it if anyone could please give me some directions.