1. The problem statement, all variables and given/known data A 10-g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. To what maximum height will the block rise above its initial position? 2. Relevant equations K = (mv^2)/2 W = F x d F = ma 3. The attempt at a solution I first calculated the initial kinetic energy of the bullet which is 5000 J, and the final as it exits the block, which is 800J, therefore am I right in assuming 4200 J has been given to the block? I tried using E = mgh for the block, then I realized I did not know how quickly the block accelerated upwards, and to find that I would need F = ma, but I don't know the force either, do i need to find those two to finish this question off? Or is there another way to go about it.