- #1

ChloeYip

- 93

- 1

## Homework Statement

A spring of negligible mass has force constant k = 1800 N/m .

You place the spring vertically with one end on the floor. You then lay a 1.30-kg book on top of the spring and release the book from rest. Find the maximum distance the spring will be compressed.

## Homework Equations

Potential energy of spring: 0.5kx^2

Potential engergy by gravity: mgh

## The Attempt at a Solution

mgx = 0.5kx^2

mg = 0.5kx

x=0.01417m(take g=9.81)

But the answer is 12cm, what's wrong with my approach?

How can I obtain the correct answer?

Thank you.