Finding Muzzle Velocity of AK47 Shell

This is a student or teacher controlled, realistic 3d simulation of an experiment that allows the muzzle velocity of a shell to be calculated using a ballistic balance.  An AK47 fires a shell into a suspended block of wood imparting its kinetic energy into the potential energy of the block and shell combined at its highest position of its swing.  Equating these two energies, and taking consideration of the equivalence of the momentums of the shell, and the shell and block together gives the required result.

The user controls the firing of the rifle and measures the extent of the swing of the ballistic balance. The user is free to move anywhere within the laboratory in order to interact with the apparatus.