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Homework Help: Antiaircraft gun force physics problem

  1. Feb 9, 2008 #1
    1. The problem statement, all variables and given/known data

    The largest-caliber antiaircraft gun operated by the German air force during World War II was the 12.8 cm Flak 40. Suppose this weapon fired a 24.4 kg shell with a muzzle speed of 910 m/s. What propulsive force was necessary to attain the muzzle speed within the 6.00 m barrel? (Assume the shell moves horizontally with constant acceleration and neglect friction.)

    2. Relevant equations


    3. The attempt at a solution

    I know the force will be obtained by multiplying 24.4 by acceleration, however i can't determine acceleration.
  2. jcsd
  3. Feb 9, 2008 #2


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    Homework Helper
    Gold Member

    What do you know about the motion of the bullet? Initial/Final Speeds? Over what distance is it accelerating? HINT: Go back to kinematics.
  4. Feb 9, 2008 #3
    Look at your constant acceleration equations

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