Question

Suppose you are standing on the sidewalk. Describe the direction of your motion relative to the car and the plane

Answer 1

Thinking about Newton's third law we could say that if I'm standing on the sidewalk the Earth is pulling you down with a gravitational force of 500 N (your force in kg), you are also pulling the Earth up with a force gravitational 500 N. And is or in relation to the car, this also goes forward driven by its engine. The plane, on the other hand, has the ability to only go forward and not down. Due to the power of its engines and its aerodynamics.