# Proof 200: Inertia Revisited

21) If the Earth were truly constantly spinning Eastwards at over 1000mph, helicopters and hot-air balloons should be able to simply hover over the surface of the Earth and wait for their destinations to come to them!

22) If Earth were truly constantly spinning Eastwards at over 1000mph, during the Red Bull stratosphere dive, Felix Baumgartner, spending 3 hours ascending over New Mexico, should have landed 2500 miles West into the Pacific Ocean but instead landed a few dozen miles East of the take-off point.

Remember inertia. A massive object takes more force to accelerate. An object on the surface of the Earth, including a person, is moving with constant speed. This speed is precisely the same as the Earth. The friction of the Earth is pulling everything around at the same speed. If this was not the case, a person would feel the Earth sliding under his feet. If you think this is proof against a ball rotating ball Earth, go to the airport and stand on the moving sidewalks. After getting on the sidewalk, you can stand still without the ground pulling out under your feet. People don’t feel motion. People only feel acceleration.

An airplane resting on the ground is already moving equal to the velocity of the ground under its wheels. When the plane takes off it is moving relative to the ground at takeoff velocity. If that velocity is for example 200 mph. It is moving at 1200 mph from the imaginary reference frame “at rest” relative to the surface of the Earth. A hot air balloon rising because of a vertical force lifting it directly from the ground, continues to move with the Earth’s surface, because it has not lost its momentum. In order to enter this imaginary reference frame at rest compared to the ground, the dirigible would need to accelerate in the opposite direction of the Earth’s spin to counteract this inertia.