Question dealing with collisions...refer to details section for full question?

Question

Consider a linear array of n = 10 identical blocks all initially at rest on a frictionless horizontal tabletop. The blocks are labeled 1 through "n", reading from left to right. The block all the way on the left (#1) is pushed to the right so that it has a speed of v = 15 m/s before colliding into the block immediately to its right (#2). After this #2 collides into #3, #3 collides into #4, and so on. Determine the speed of the right most block (#n) when it finally starts moving. Assume that the coefficient of restitution between each block is E = 0.72.

Answer 1

15*0.72^9 ≈ 0.780 m/s