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## Homework Statement

A mass of 115kg is to be suspended from a spring. When the mass increases to 575kg, the spring will move. Find the spring constant k. (This is not from a text book, it is a project problem for a vehicle unloaded and then loaded on the same spring).

y1 is the maximum height I have but y2 can be changed if needed.

## Homework Equations

(y1-y2)k = mg

## The Attempt at a Solution

(0.2)k = (575)(9.81)

k = 5,640/0.2

k = 28,200N/m

This looks very wrong, comparing to a website that sells a spring holding 1300lb (590kg) gives a rate of 300(136kg/m) or around 1,300N/m

How is my answer so wrong?

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