1. The problem statement, all variables and given/known data A 10.1 g bullet is fired horizontally into a 44.1 g wooden block that is initially at rest on a rough horizontal surface and connected to a massless spring of constant 97.8 N/m. If the bullet-block system compresses the spring by 0.441 m, what was the speed of the bullet just as it enters the block? The acceleration of gravity is 9.8 m/s 2 . Assume that the coefficient of kinetic friction between the block surface is 0.554. Answer in units of m/s. 2. Relevant equations The equation our teacher gave us to solve it is: 1/2 mv^2= 1/2kx^2 + Fd but I've used the equation and it hasn't worked for me. 3. The attempt at a solution Using the equation above. Is the equation right?