1. The problem statement, all variables and given/known data A moving 1.3 kg block collides with a horizontal spring whose spring constant is 491 N/m.The block compresses the spring a maximum distance of 5.0 cm from its rest postion. The coefficient of kinetic friction between the block and the horizontal surface is 0.49.What is the speed of the block when it hits the spring? 2. Relevant equations W_spring=1/2kx^2 KE=1/2mv^2 3. The attempt at a solution I do not understand how to calculate the blocks velocity. Can someone help me out with this one?