Question

“It’s not the fall that hurts you; it’s the sudden stop at the bottom.” Translate this saying into the language of Newton’s Laws

Answer 1

that means that if you fall into huge gas ball you won't get harm.
it is the second law of newton:
\[F = ma = \frac{ \Delta P }{ \Delta t }\]
when there is sudden stop the the acceleration is too high , so the force is also high.
when there is sudden stop the time required to change the momentum is so low,so you will get huge force.