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    olucatero's Avatar
    olucatero Posts: 1, Reputation: 1
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    #1

    Dec 12, 2012, 05:34 PM
    Answer to all physics questions
    A 13g bullet traveling at 330m/s penetrates a 2 kg block of wood and emerges going 270m/s. if the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Dec 13, 2012, 08:04 AM
    Use the principle of they conservation of momentum to solve this:



    You have values for both masses, the initial velocities of both, and the final velocity of one - so now you can solve for the final velocity of the other.
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