The length of a spring increases by 6.7 centimeter from its relaxed length when a mass of 1.5 kilogram is hanging in equilibrium from the spring.
a) Estimate what is the spring constant?
b) Obtain how much elastic potential energy is stored in the spring?
c) A different mass is suspended and the spring length increases by 11.7 centimeter from its relaxed length to its new equilibrium position. Determine what is the second mass in kilogram?