A bullet of mass $\rm 8 g$ moving with velocity $\rm 400 ms^{-1}$ gets embedded in a freely suspended wooden block of mass $\rm 800 g$. What is the velocity acquired by the block?

Question

parthkohli · Answer

I keep getting $\rm 4 ms^{-1}$ but my course module says it's $3.96 \rm ms^{-1}$.

parthkohli · Answer

@Mashy

anonymous · Answer

momentum conservation

8 X 400 = 808 X (velocity of wooden block)

anonymous · Answer

you forgot to consder the masss of the bullet in the wooden block :P

parthkohli · Answer

OMG, wait...

parthkohli · Answer

Let me try that.

parthkohli · Answer

I'm a newb. Thanks!

anonymous · Answer

newb? :O.. you have 99 smartscore

parthkohli · Answer

Yeah. SmartScore is just a number. No wait, SmartScore is a word.

anonymous · Answer

:P