Why do you get pushed back into the seat when a car accelerates but not when when walking in a flying airplane?

Question

The airplane is going much faster than the car. I’m a bit confused. I’m guessing it has something to do with acceleration vs constant speed but not entirely sure how that works.

Any explanation is appreciated!

In: Physics

Answer 1

Travelling in the plane is the same as travelling in the car, you are moving at the same speed as the plane/car. You’re free to move about.

Accelerating in the plane is the same as accelerating in the car, your body is stationary and the plane/car is moving forward. You feel the forces of the acceleration.