A fight breaks out, and Isaac Newton watches the quarrel and draws conclusions about forces based on his observations. Each boy is considered a mass, and each of their pushes is a force. At the end of the scuffle, Newton labels his conclusions "The Laws of Motion." This clip is an excellent depiction of Newton's laws of motion in a real-world context.
Hypathia incorrectly guesses how a sack will fall when it is dropped on a moving boat. She observes that the sack behaves as if the boat was stationary. Hypathia believes the same principle can be applied to the Earth: it is moving around the Sun without us realizing it.
The MythBusters conduct a test at NASA to determine whether a flag on the moon would wave as it does in the video footage of the first moon landing. They find that momentum alone can keep a flag moving in a vacuum; wind is not needed.
Sheldon explains how he uses a toy train and a ball to prove Newton's first law of motion. As the train moves, he pushes a button to propel the ball in the air. The ball lands in the same spot on the train where it was propelled. The ball moves at a constant velocity in an inertial frame of reference.