A block of 10 kg is released from rest at a rough 10 m long 30* incline. The coefficient of friction among incline and box is 0.2. At the bottom of the incline is a frictionless flat track. The bock travels down the track, strikes a spring of force constant k = 100 N/m. Find out the speed of the block at the bottom of the incline and the maximum compressing distance of the spring from symmetry.