A spring of negligible mass has force constant k = 1800 N/m . How far must the spring be compressed for an amount 3.20 J

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A spring of negligible mass has force constant k = 1800N/m .
How far must the spring be compressed for an amount 3.20 J
of potential energy to be stored in it?
You place the spring vertically with one end on the floor. Youthen drop a book of mass 1.30 kg onto it from a height of 0.500m
above the top of the spring. Find the maximum distance thespring will be compressed.
Take the free fall acceleration to be 9.80 m/s2