1. The problem statement, all variables and given/known data a .440 kg block of wood hangs from he ceiling by a string, and a 7.3x10^-2 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 5.50 m/s. The wad of putty sticks to the block. is the mechanical energy of this system conserved? how high does the putty-block system rise above the original position of the block? 2. Relevant equations pi=pf E1=E2 3. The attempt at a solution yes the mechanical energy is conserved because it is an inelastic collision pi=pf mvi=(m1+m2)v v=mvi/m1+m2 v=(7.3x10^-2)(5.5)/(7.3x10^-2)+.440 v=.4015/.513 v=.7827 E1=E2 K1U1=K2U2 1/2 (m1+m2)v^2=1/2 Kx^2 .2565(.7827^2)=1/2 kx^2 is this right so far?