Final answer:
Air resistance is not negligible during the takeoff of a jet plane, as the forces involved require the engines to produce significant power to overcome this resistance, leading to a longer time to reach the necessary takeoff speed and altitude.
Step-by-step explanation:
The question, 'Is air resistance negligible during the takeoff of a jet plane?' is a physics-related query. When considering a jet plane speeding down the runway for takeoff, air resistance is not negligible. As the plane speeds up, air resistance increases, which can significantly affect the plane's ability to accelerate and reach the necessary takeoff speed. This is apparent because the engines require a significant amount of power to overcome the air resistance.
For part (a), if air resistance were negligible, we could calculate the time taken to reach a certain speed using the power provided by the engines and the kinetic energy the plane would need at that speed. However, part (b) of the question indicates that it actually takes longer (900 s) to reach takeoff speed and altitude, meaning that air resistance is indeed playing a role. For (c), knowing the power and increased time it takes to reach the desired speed, we can calculate the average force of air resistance.