with earth rotating at 1000mph, when we launch ourselves from a trampoline how are we landing back at the same spot compared to launching from a moving car

Question

If we jump high enough to reach a hang time of 1 second, the earth would have moved quarter mile.

Also, why haven’t we devised something that allows us to stay suspended instead of using airplanes with max speed of 500mph

In: 2

Answer 1

The air and the ground move together.

If you jump up and down inside a moving vehicle like a train or a bus you will land in more or less the same place inside the vehicle that you started from.

Even jumping up and down in the bed of a moving pickup truck will not do too much unless you go fast enough for air resistance to become a serious factor.

In theory, since the air is round and the higher you go the faster you move, you wouldn’t land back exactly where you started even with air being completely still, but that effect is minor and can be ignored at the sort of heights humans can jump.

We do have things to suspend things and people above the ground, including cranes, balloons and even geostationary sattleties.

I am not sure what else you are looking for.