Answer to Question #58178 in Classical Mechanics for Tiara

Question

The spring-flex exercise system consists of a spring with one end fixed and a handle on the other end. The idea is that you exercise your muscles by stretching the spring from its natural length, which is 31 cm. If a 190 Newton force is required to keep the spring stretched to a length of 44 cm, how much work is required to stretch it from 51 cm to 67 cm?