1. The problem statement, all variables and given/known data A Block of mass M is attached to a cable of length L. It is initially held at the horizontal position at rest. It is then released in the motion of a pendulum and collides with a bullet of mass m, traveling at a speed of Vi, at the lowest point of its trajectory. The bullet embeds in the block and stops its motion completely. What is the speed of the bullet just before it hits the block? 2. Relevant equations conservation of linear momentum cons. of energy 3. The attempt at a solution I know cons. of linear momentum applies regardless of the collision type, so taking the initial to be the moment before the collision and the final to be after the collision I get: mV1i = -MV2i It seems like an inelastic collision, so cons. of energy does not apply during the collision. I'm a bit stuck here.