3) A 15.0 kg block is released from rest at point A. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, collides into another 15.0 kg block, which hits a spring with a spring constant of 2200 N/m, and compresses the spring 0.250 m from its equilibrium position before coming to rest momentarily. Determine the following: [K10, T10, C10, A10] (a) The concepts involved and the associated assumptions to this problem. (b) The amount of work done by friction. (c) The coefficient of kinetic friction. (d) The rate of change of energy. A 3.00 m 6.00 m C