The relaxed length of a vertical spring is 4.22 m. When a 5 kg object is attached to the end of the spring, the vertical length of the spring is 5.72 m and the object is found to be 10. m from the ground. Calculate using significant figures. a) X = m

b) The spring constant K = N/m

c) The elastic potential energy PEe = J

d) The gravitational potential energy PEG = J

e) Given that formula to calculate the total potential energy of the system is PETOTAL = PEG + PEe, calculate the PETOTAL = J