Use image for both problems what type of energy does each type of the pendulum represents a. b. c. according to the lay of conversion of mechanical energy, if the only force acting on this pendulum is gravity, the total energy of the system is

A12-g wad of sticky clay is hurled horizontally at a 100-g wooden block initially at rest on a horizontal surface. the clay sticks to the block. after impact, the block slides 7.5 m before coming to rest. if the coefficient of friction between the block and the surface is 0.65, what was the speed of the clay immediately before the impact?