Q1. A 10.0g bullet is fired horizontally into a 101g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 141 N/m. The bullet becomes embedded in the block. If bullet-block system compresses the spring by a maximum of 80.0cm, what was the speed of bullet at impact with the block?
Q2. A hunter wishes to cross a river that is 1.2km wide and that flows with a speed of 3.0 km/h. The hunter uses a small powerboat that moves at the maximum speed of 11.2km/h with respect to the water. What is the minimum time essential for crossing?