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Homework Help: Constant Acceleration; Dynamics

  1. Jun 10, 2013 #1
    1. The problem statement, all variables and given/known data

    Problem: Calculate the constant acceleration a in g’s which the catapult of an aircraft carrier must provide to produce a launch velocity of 188 mi/hr in a distance of 299 ft. Assume that the carrier is at anchor.

    2. Relevant equations

    V^2 = 2AD

    3. The attempt at a solution

    Okay so I got an answer of 14232.9518 G's. This seems far too large.
    I converted feet to miles first and got 35344 mi^2/hr^2 = 2A(.0566) solving for A I got A = 312,226.1484 mi/hr^2 then converted to G's. What am I doing wrong here?
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jun 10, 2013 #2

    jack action

    User Avatar
    Science Advisor
    Gold Member

    The problem lies in your conversion from mi/h² to ft/s². They are 3600 seconds in an hour and you have to square it.
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