1. The problem statement, all variables and given/known data Block A is moving downward at 5 ft/s at a certain time when the spring is compressed 6 inches. The coefficient of friction between block B and the plane is 0.2, the pulley is light, and the weights of A and B are 161 and 193 lb, respectively. a) Find the distance that A falls from its initial position before coming to zero speed b) Determine whether or not body A will start to move back upward 2. Relevant equations F=ma W=ΔT work by spring = (-1/2)(x) 3. The attempt at a solution The answers are a) 4.78 ft b) A will start back upward No idea how to start. I suppose I apply F=ma to each A and B separately? Then somehow invoke the work energy equation to figure it out? How do I handle the spring? And the spring compressed 6 inches confuses me. Thanks for the help.