A lorry is travelling around a roundabout at constant speed. Why is its velocity changing?
Because velocity is a vector and therefore has both magnitude and direction. Thus as the lorry is changing direction whilst travelling around the roundabout its velocity is also changing (velocity = displacement / time).
AL
Related Physics GCSE answers
All answers ▸What is the difference between speed and velocity?
A transformer has an input voltage of 4V, an output voltage of 8V and 50 turns on its primary coil. Assuming 100% efficiency, find the number of turns on the secondary coil.
If a race car completed a full lap and is where he started, why is his average velocity zero but his average speed isn’t?
What is polarized light?