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Homework Statement
Which equation could adequately be used to determine how high the block goes after being hit by the bullet (a height h)? (see figure)
(m+M)gh+ksh=1/2(m+M)V^2
(m+M)gh+1/2ksh^2=1/2(m+M)V^2
(m+M)v+ksh=(m+M)V
Homework Equations
KE=1/2mv^2
Ugrav=Mgh
PE of spring = 1/2ks(s^2 final  s^2 initial)
The Attempt at a Solution
Based off of the equations, I believe the answer should be the second equation. I don't understand what else it could be..
I have only one attempt
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