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March 25, 2017

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A Pratt and whitney PW4000 turbofan engine is able to provide a maximum thrust of 2.49 x 100000 N.A Boeing 747-400 airliner has four of these engines. If its mass is 2.72 x 100000 kg, what is its acceleration?

  • Physics - ,

    That will depend upon the aerodynamic drag, which was not provided.

    If the drag were zero, the acceleration would be F/m =
    4*2.49*10^5/2.72*10^5 m/s^2
    = 3.67 m/s^2

    Zero drag is a fair approximation at low speeds, e.g. takeoff.

  • Physics - ,

    That will depend upon the aerodynamic drag, which was not provided.

    If the drag were zero, the acceleration would be F/m =
    4*2.49*10^5/2.72*10^5 m/s^2
    = 3.67 m/s^2

    Zero drag is a fair approximation at low speeds, e.g. takeoff.

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