Cons It takes a force of 500 N to stretch an ideal spring 200 cm Part A What force does it take to stretch the spring an additional 4,00 cm? Express your answer with the appropriate units. HÃ] * * * 3 ? Value Units Submit Request Answer Part B By what factor does the stored elastic potential energy increase when the spring, orginally stretched 200 cm is stretched 400 cm more? PO A ROO? Uo/U =