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What is the length of the catapult?

  1. Jul 14, 2007 #1
    1. The problem statement, all variables and given/known data

    A Jet fighter plane is launched from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0s. Assuming the acceleration is constant, what is the length of the catapult?

    Am I looking at this correctly?

    final velocity(Vf) is 42 m/s

    initial velocity(Vi) is 0 m/s

    time(t) is 2.0 s

    acceleration(a) is 21 m/s^2 (I'm assuming this because if it started from rest and after 2 seconds is traveling 42 m/s than the acceleration must be half of that? or am I way off? )

    Here's my solution, Vf^2 = Vi^2 +2ad

    (42 m/s)^2 = 0 + 2(21 m/s^2)d

    d = 42^2 / 42 = 42m

    Am I doing this correctly? Thank you for any help in advance.

    - Otis
  2. jcsd
  3. Jul 14, 2007 #2


    User Avatar

    Yep, looks right.
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