A 2.30 g bullet embeds itself in a 1.6 kg block, which is attached to a spring of force constant 770 N/m.
A) If the maximum compression of the spring is 5.40 cm, find the initial speed of the bullet.
Step one: convert everything to kg and m
Step two: 1/2 mvi^2 = 1/2 kA^2
The Attempt at a Solution
I first tried to solve the above equation for vi, and then plug in the rest since m, k, and A are given, but this gave me 29.1 m/s and that is not the correct answer. I am not sure where else to go with this, this is the only equation I know that deals with initial velocity!