Suppose a 10 kg mass is hung from the end of a vertical oriented, massless spring. If the spring stretches 10 cm, what is the spring constant of the spring? 2) A 1- kg mass is placed at the end of a vertically oriented, massless spring. When the spring is stretched and let go, the mass at the end of the spring oscillates with a period of 2 seconds. What is the spring constant of the spring?