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

Momentum is conserved. If you simply jump up on on a moving platform, you’ll still be moving side ways through the air. When you are launched from a car, what happens is a *change in momentum*, i.e. the car stops moving but your body keeps moving bat the speed the car was moving before crashing.