Two boats move by inertia in the still waters of a lake. The boats move towards one another on parallel courses at the same speed of 6m/sec. As they come alongside one another, a load is transferred from the first boat to the second. After this the second boat continues to move in its initial direction, but with a speed of 4 m/sec. The first boat continues witl its initial velocity. Find the mass of the second boat if the first boat weighs 500kg-wt without the load and 560 kg-wt with the load. Calculate the energy possessed by the boats and the load before and after the transfer of the load. Explain why this energy has changed. Neglect the friction of the water.
