Yes it is possible for a human to throw a Baseball from home plate over the outfield wall of a major league stadium. This is a distance of about 320 to 400 feet. According to the New York Times Sheldon Lejeune of the Evansville Club of the Central League threw a baseball 426 feet 6 and 1/4 inches breaking the world record by 25 feet 10 inches.
When you throwa balland give it aforwardmotion, Gravity pulls the ball towards thecenter of earth. The ball has two motions ... horizontal (forward) and a downwardmotion. The horizontal speed is constant, or at least nearly constant, but thedownward speed is constantly growing because of the downward gravitational forceon the ball. A constant horizontal speed together with vertical acceleration is a surerecipe for a curved path.
US Single-pole switchIn the US, the standard "single-pole" light switch is single-pole single-throw, with only 2 terminals. In the ON position it connects the two terminals, and in the OFF position it doesn't. The standard US "3-way" light switch (used for switching a light from two different switches) is single-pole double-throw. It has 3 terminals (hence the term "3-way"), and it connects one of those terminals to either of the other two, depending on the switch position. There's no OFF position, so the switch has only two positions.