A bullet with a mass m=12.5 g and speed v=85.4 m/s is fired into a wooden block with M=113 g which is initially at rest on a horizontal surface. The bullet is embedded into the block. The block-bullet combination slides across the surface for a distance d before stopping due to friction between the block and surface. The coefficients of friction are μs=0.753 and μk=0.659. What is the speed of the block-bullet combination immediately after the collision?

Question

A bullet with a mass m=12.5 g and speed v=85.4  m/s is fired into a wooden block with M=113 g which is initially at rest on a horizontal surface. The bullet is embedded into the block. The block-bullet combination slides across the surface for a distance d before stopping due to friction between the block and surface. The coefficients of friction are μs=0.753 and μk=0.659.  What is the speed of the block-bullet combination immediately after the collision?