I am having difficulty understanding a basic idea about momentum.(adsbygoogle = window.adsbygoogle || []).push({});

I already learned several different types of momentum problems but this one is confusing me. Thanks for your help in advance.

"A 10 g bullet is fired into a 10 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.0 cm across the table. What is the speed of the bullet?"

I have tried to read past threads on this for the sake of repitition but i couldnt find any like this. We havent covered Energy yet, and most of the past threads either dealt with friction (which I assume is neglegent, because it is not mentioned, and our teacher wouldnt require us to find a chart on the coefficient of wood to wood) or the problems dealt with energy, which I dont know how to do yet.

I understand that this is an inelastic collision, but I don't understand where to start. What confuses me is that you know the box slides 5 cm but you dont know how long it took or its acceleration... It just seems like there are too many unknowns to solve the problem. No, I didnt wait until the last minute to do the homework assignment, and yes i will be going to my teachers office hours tomorrow, but its bugging me and I'd like to know this technique before i cal sleep tonight so any help will be appreciated...thanks :rofl:

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# Homework Help: Momentum - Bullet

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