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March 27, 2017

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A catapult 100 m long launches a 3.0 x 10^4 kg jet from the deck of a carrier. Starting at rest, the plane takes off with a speed of 80 m/s. Find: a)The acceleration, b) the average force, c) the work done, d) time to accelerate , e) the power developed.

  • Physics 1 - ,

    a. a = (V^2-Vo^2)/2d.
    a = (6400-0)/200 = 32 m/s^2.

    b. F = m*a = 30,000 * 32 = 960,000 N.

    c. W = F*d = 9.6*10^5 * 10^2=9.6*10^7 J.

    d. t = (V-V0)/a = (80-0)/32 = 2.5 s.

    e. P=W/t=9.6*10^7J./2.5s=3.84*10^7 J/s.

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