A 7 kg dog stands at the far end of a 2.5 m long boat of mas…

A 7 kg dog stands at the far end of a 2.5 m long boat of mass 15 kg, a total distance of D= 10 m from the shore. He then walks to the other end of the boat, towards the shore. Assuming no friction between the boat and the water, by how much did the boat move from its original position? Report your answer as positive if it moved away from the shore.

A 10 g bullet moving directly upward at 900 m/s strikes and…

A 10 g bullet moving directly upward at 900 m/s strikes and passes through the center of mass of a 5.0 kg block initially at rest. The bullet emerges from the block moving directly upward at 300 m/s. To what maximum height does the block then rise above its initial position?