- #1

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Jumping requires the force of reaction of the ground, this implies that we need to exert a force on the floor in the elevator.

Assume no or little air resistance - we are in a free-fall, therefore the normal force acting on our body is $0$ therefore, it is not possible to jump.

However, if the air resistance were larger, we would not experience air resistance and so we would exert a force on the floor of the elevator, receiving the normal force due to the third rule of motion. In this case, jumping would be possible.

Therefore, does it mean that in real life situations, it is possible to jump in a falling elevator?