1. The problem statement, all variables and given/known data A block of mass m slides along a frictionless track with speed vm. It collides with a stationarty block of mass M. Find an expression for the minimum value of vm that will allow the second block to circle the loop the loop without falling off if the collision is perfect inelastic. 2. Relevant equations Uinitial+Kinitial=Ufinal+Kfinal U=mgh K=1/2mv^2 3. The attempt at a solution Since this is a frictionless track, there is no initial kinetic energy, but that is all i really can figure out i am completely lost someone please help!