kingkushkaz9149 kingkushkaz9149 07-03-2024 Physics contestada The 20-lb smooth collar is attached to the spring that has an unstretched length of 4 ft. If it is released from rest at position A, determine its speed when it reaches point B. A. Insufficient information B. 10 ft/s C. 20 ft/s D. 40 ft/s