A horizontal line means the object is moving at a constant speed. The gradient of the line = the rate of change of speed. The steeper the line, the greater the increase in speed. The area under the ...

This series of short explainer films with Professor Brian Cox comprises six clips focused on forces, speed and motion. Each ...

I’m riding my bike along the Hudson River, cruising along at a good fast rhythm, when another cyclist coming the other way pops out from behind a couple pushing a Bugaboo and veers onto my path.

So, you’re driving a car at half the speed of light. (Both hands on the wheel, please.) You turn on the headlights. How fast would you see this light traveling? What about a person standing by the ...