The net external force on the propeller of a 3.6 kg model airplane is 8.4 N forward.
What is the acceleration of the airplane?
Answer in units of m/s

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  1. 8.4 = 3.6 a
    a = 8.4/3.6
    IF the airplane is stopped and there is no drag on the airplane surfaces due to the propeller wake and there is no friction between the plane and the runway

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