Flight Definition and 353 Threads

Hi Everyone! Like always, thank you for helping me figure out my last physics question! I greatly appreciate the help. Here are my next questions: Q: Determine the speed at which a baseball must move in order for air resistance to be significant? A: mg = ½ * Cd * A * pair * v^2 pair =...

Here's the question, A stone is thrown vertically upward with a velocity of 26.0 m/s from the top of a tower having a height of 18.5m. On it's return it misses the tower and finally strikes the ground. What was the elapsed time of the flight stone? I started if off with delta y=...

The secret of antigravitational flight, as told by ETs In an UFO forum, where I´m the resident skeptic, some one gave me this contactee message, given to him by a ET, that is some kind of Physics unknown to humanity, and that is the secret of antigravitational flight. I know almost...