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anonymous

  • one year ago

A 2.00 g bullet is fired from a rifle with an in itial velocity of 841 m/s. If the rifle has a mass of 3.80 kg, the recoil speed of the rifle

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  1. anonymous
    • one year ago
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    i did 0=mv+m2v2

  2. anonymous
    • one year ago
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    i was getting 4.42*10^-2 but thats wrong ?

  3. anonymous
    • one year ago
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    i get 4,42*10^-2 too

  4. anonymous
    • one year ago
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    the answer is 3144

  5. anonymous
    • one year ago
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    like 3.14*10^-4

  6. anonymous
    • one year ago
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    @IrishBoy123 what u thiink?

  7. IrishBoy123
    • one year ago
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    your method seems sound though you are out by a factor of 10. \(4.42(10^{-2}) \times 3.8 = 0.168\) \(2(10^{-3}) \times 841 = 1.68\) i just wonder if it's worth posting a scan of the question or a link...

  8. anonymous
    • one year ago
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    @IrishBoy123 here

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  9. IrishBoy123
    • one year ago
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    so that gives \(4.43 \times 10^{-1}\) or in the form the question requires: a 4 b 4 c 3 d 1 which starts to *resemble* the answer you posted, when you posted it as "3144"

  10. anonymous
    • one year ago
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    yes

  11. anonymous
    • one year ago
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    so the answer is wrong ?

  12. anonymous
    • one year ago
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    like a typo u think?

  13. anonymous
    • one year ago
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    @IrishBoy123 can u help me with this ?

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  14. IrishBoy123
    • one year ago
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    sure post as a new question if you can do that now, i can be here

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