Problems 1. A 6.0 kg object is attached to a string and a spring as shown below. When the 6.0 kg object is swung in a circle with a period of 1.57 s, the spring stretches to 5.0 m, the same length as the string. What is the unstretched length of the spring if the spring constant is 100 N/cm? M = 6 kg 5 m T = 1.57 5 8 m 16 kg 5m