A spring of negligible mass has force constant k = 1800N/m .
A. How far must the spring be compressed for an amount 3.40J of potential energy to be stored in it?
B. You place the spring vertically with one end on the floor. You then drop a book of mass 1.20kg onto it from a height of 0.800m above the top of the spring. Find the maximum distance the spring will be compressed. Take the free fall acceleration to be 9.80m/s2.