The electric cars of the Formula E racing championship can accelerate faster than Formula 1 cars and their top speeds are catching up – but battery capacity would let them down in a head-to-head ...

The land speed record for steam-powered cars has been broken for the first time in more than 100 years, after a British-built car achieved an average speed of 225 kilometres per hour (140 miles per ...

It is not only moving objects that have varying speed. The speed of the wind and the speed of sound also vary. A typical value for the wind is about 12 m/s and the speed of sound in air is about 330 m ...