Physics Uncovered on Instagram: "Prof. Walter Lewin’s well-known basketball–tennis ball experiment is a classic way to show how elastic collisions and momentum transfer work. When the two balls are dropped at the same time, the basketball rebounds off the ground and passes much of its momentum to the tennis ball. As a result, the tennis ball shoots upward to a height far greater than its original drop point. This dramatic demonstration highlights the conservation of both energy and momentum duri

Motivation Solution on Instagram: "In 2008, Japanese researchers at Nagoya University conducted a controlled experiment to demonstrate how traffic jams can form without any visible cause, a phenomenon known as a “phantom traffic jam.” They placed 22 vehicles on a circular track and asked drivers to maintain a constant speed. Despite no obstacles or lane changes, small variations in speed naturally amplified over time, eventually creating a self-sustaining stop-and-go wave—just like what’s seen o