- #1

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## Homework Statement

A spring has a relaxed length of 5 cm and a stiffness of 50 N/m. How much work must you do to change its length from 10 cm to 14 cm?

## Homework Equations

W= -U = F(delta R) = (Ks)(s)

## The Attempt at a Solution

-attempted solving this problem using the formula above

-got a value of 0.08 J

-value is apparently incorrect

-not quite sure where I went wrong