h: i dont even know what wind resistance has to do with this...

 

If you were to spit in a vacuum (the kind with no air, not the hoover), the spit would travel faster than you and the vehicle. The reason is because the spit was already traveling at your velocity. When you spit, you gave the spit an acceleration that changed its velocity to some amount. Now not only does it use the force that you by moving have, but now you have applied another force (spitting force) in addition.

The reason spit hits you in the face is because the surface area of the spit is susceptible to wind resistance (drag). So although you may be traveling through the wind through some aerodynamic method (say a car), your surface area and what is exposed while in the car is more aerodynamic than you spitting in the wind.

 

ooppps now i understand why i have the "wind resistence" awnser.... i meant to say howcome the spit DOESNT hit you in the face... and you anwsered that... i thought that same anwser would apply to the jumping at the equator question.