2. A bullet of mass 4.0 g, moving horizontally with a velocity of 5 x 102 m/s [N], strikes a wooden block of mass 2.0 kg that is initially at rest on a rough, horizontal surface. The bullet passes through the block in a negligible interval, emerging with a velocity of 1-0 X 102 m/s [N], and causing the block to slide 0.40 m along the surface before coming to rest. (a) With what velocity does the wooden block move just after the bullet exits? (b) What is the maximum kinetic energy of the block? (0) What is the average frictional force stopping the block? ((1) What is the decrease in kinetic energy of the bullet