Home Of Viral Reels on Instagram: "Walter Lewin’s experiment shows an important idea in physics: movement in one direction does not affect movement in another direction. In the demonstration, a ball is shot straight up from a machine that is moving forward at a steady speed. Even though the machine keeps moving, the ball falls straight back into it instead of landing behind. This happens because the ball keeps moving forward at the same speed as the machine after it is launched. Gravity only pul