Mathematics, 22.06.2019 11:40 natethawsm
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 37 cm. if a 130 newton force is required to keep the spring stretched to a length of 50 cm, how much work is required to stretch it from 53 cm to 68 cm?
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