In this picture, a famous baseball player is throwing the ball from the outfield to the infield. In order to get the maximum distance, the player has to throw the ball at a 45 degree angle. The player does not want to leave the ball short otherwise errors may occur or runs could be scored. This example relates to physics because it uses trajectory, angle, trigonometry, and distance. 45 degrees is the optimal angle because, the ball goes high enough to travel far but not too high so that it takes too long for it to come back down.
This applies to everyday life because many people play some sort of “throwing” sport. Most players think throwing the ball hard will get maximum distance, when in reality the angle of the ball matters more.
Physics by Mike 