Mathematics, 20.02.2021 08:30, xojade

Suppose that 20 Joules of work is needed to stretch a spring from its natural length of 1 m to 2 m. (a) Determine how much work is needed to stretch the spring from 1.5 m to 2.5 m.
(b) How far beyond its natural length will a force of 500 N keep the spring stretched?

Use the substitution u = √ x to express the integral below in terms of u. Do not evaluate the integral.

Integral sign(√ x /1 + √ x) dx

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Suppose that 20 Joules of work is needed to stretch a spring from its natural length of 1 m to 2 m....