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Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) An 1800-kg tractor exerts a force of $1.75\times 10^{4}\textrm{ N}$ backward on the pavement, and the system experiences forces resisting motion that total 2400 N. If the acceleration is $0.150 \textrm{ m/s}^2$, what is the mass of the airplane? (b) Calculate the force exerted by the tractor on the airplane, assuming 2200 N of the friction is experienced by the airplane. (c) Draw two sketches showing the systems of interest used to solve each part, including the free-body diagrams for each.
Question by OpenStax is licensed under CC BY 4.0.
Final Answer
  1. $9.89 \times 10^{4}\textrm{ kg}$
  2. $1.70\times 10^{4}\textrm{ N}$
  3. Solutions should always have such sketches! See parts (a) and (b) in the solution video.
Solution Video

OpenStax College Physics Solution, Chapter 4, Problem 28 (Problems & Exercises) (4:28)

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