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Homework Help: How to tell how far bullet went using sound

  1. Jan 7, 2010 #1
    1. The problem statement, all variables and given/known data

    A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 170 m/s, and the person hears the bullet strike the target 1.30 s after firing it. The air temperature is 72°F. What is the distance to the target?

    2. Relevant equations
    Vc=331+(0.6*T)
    Vc= speed of sound through dry air (m/s)
    T= temperature(Degrees C)



    3. The attempt at a solution
    Vc=331+(0.6*22.2)=344.32m/s
    170x+344.32(1.3-x)=D
     
  2. jcsd
  3. Jan 7, 2010 #2

    ideasrule

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    Homework Helper

    One more condition: the bullet has to travel exactly as far in getting to the target as the sound does in travelling back.
     
  4. Jan 7, 2010 #3
    Thank you. Got it
     
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