A spring hangs vertically from the ceiling. When you attach a mass of 5.55 kg the spring stretches by 2.75 cm. You now remove the 5.55 kg mass, and attach a mass of 10.5 kg. How far does the spring stretch? Enter your answer in cm. A 6.05 kg box is horizontally attached to a spring and sits at rest on a table in equilibrium. To move the box a distance (3] requires 28.5 J of energy. If you now move the box twice as far, in other words you stretch the spring by an additional distance d, how much more energy do you need to supply? Assume there is no friction between the box and the table