Explain why velocity can change if direction changes even when speed is constant.

In the subtopic Distance, displacement, speed and velocity, this learning objective focuses on explain why velocity can change if direction changes even when speed is constant. For AQA GCSE Physics 8463 Unit 4.5 Forces, keep the explanation inside Distance, displacement, speed and velocity and Forces and motion. Approved keywords for this objective include speed, velocity, and direction. A strong answer separates speed and velocity, uses correct units where quantities are involved, and links the physical reasoning back to explain why velocity can change if direction changes even when speed is constant. This is not a generic revision point: it is specifically about Distance, displacement, speed and velocity, Forces and motion, and the approved wording of the learning objective.