15-61. The 15-kg block A slides on the surface for which Hk = 0.3. The block has a velocity v = 10 m/s when it iss = 4 m from

the 10-kg block B. If the unstretched spring has a stiffness k = 1000 N/m, determine the maximum compression of the spring due to the collision. Take e =0.6.%