What is speed? Well, let's think about an example. Let's say that you're going ... The most commonly used unit in Physics is metres per second (m/s). Based on what you have learned about the ...

For example, converting the ... experiment showed that light’s speed is constant, regardless of Earth's motion, suggesting the ether didn't exist. Physics needed a new framework.

videoThe importance of checking mathematical answers A reminder to always sense-check mathematical answers in physics, using a speed calculation as an example. Average speed. videoAverage speed An ...