An autonomous underwater vehicle (AUV) is mapping a section of a deep-sea trench. It travels along a winding, non-linear path from point A A\,A to point BBB.

The AUV takes 2.5 minutes to complete the journey, covering a total path distance of 75 m. The straight-line distance from starting point A A\,A to finishing point B B\,B is 15 m.
Explain why the average speed and the magnitude of the average velocity of the AUV are different from one another.
You should include calculations in your answer.
Practise OCR GCSE Physics Motion with exam-style questions for Foundation and Higher tier. 97 questions, matched to the OCR GCSE Physics (J249) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.