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 ▸Explain why the moon is not pulled away from the Earth by the Sun.
Describe a simple experiment to determine the speed of sound in air.
Explain what the terminal velocity of an object is.
A force of 13.8 N was used to lift a mass 30 cm vertically through a liquid. Calculate the work done in lifting the mass, stating the correct units.